private void AddPreviousQuest(QuestId questToUpdate, QuestId requiredQuestId)
     {
         QuestInfo quest = (QuestInfo)_quests[questToUpdate];
-        quest.AddPreviousQuest(new QuestInfo.PreviousQuestInfo(requiredQuestId));
+        quest.AddPreviousQuest(new PreviousQuestInfo(requiredQuestId));
     }
 
     private void AddGcFollowUpQuests()
         foreach (QuestId questId in questIds)
         {
             QuestInfo quest = (QuestInfo)_quests[questId];
-            quest.AddQuestLocks(QuestInfo.QuestJoin.AtLeastOne, questIds.Where(x => x != questId).ToArray());
+            quest.AddQuestLocks(EQuestJoin.AtLeastOne, questIds.Where(x => x != questId).ToArray());
         }
     }
 
 
             return IsQuestLocked(questId, extraCompletedQuest);
         else if (elementId is LeveId leveId)
             return IsQuestLocked(leveId);
-        else if (elementId is SatisfactionSupplyNpcId)
-            return false;
+        else if (elementId is SatisfactionSupplyNpcId satisfactionSupplyNpcId)
+            return IsQuestLocked(satisfactionSupplyNpcId);
         else
             throw new ArgumentOutOfRangeException(nameof(elementId));
     }
 
-    public bool IsQuestLocked(QuestId questId, ElementId? extraCompletedQuest = null)
+    private bool IsQuestLocked(QuestId questId, ElementId? extraCompletedQuest = null)
     {
         if (IsQuestUnobtainable(questId, extraCompletedQuest))
             return true;
         return !HasCompletedPreviousQuests(questInfo, extraCompletedQuest) || !HasCompletedPreviousInstances(questInfo);
     }
 
-    public bool IsQuestLocked(LeveId leveId)
+    private bool IsQuestLocked(LeveId leveId)
     {
         if (IsQuestUnobtainable(leveId))
             return true;
         return !IsQuestAccepted(leveId) && QuestManager.Instance()->NumLeveAllowances == 0;
     }
 
+    private bool IsQuestLocked(SatisfactionSupplyNpcId satisfactionSupplyNpcId)
+    {
+        SatisfactionSupplyInfo questInfo = (SatisfactionSupplyInfo)_questData.GetQuestInfo(satisfactionSupplyNpcId);
+        return !HasCompletedPreviousQuests(questInfo, null);
+    }
+
     public bool IsQuestUnobtainable(ElementId elementId, ElementId? extraCompletedQuest = null)
     {
         if (elementId is QuestId questId)
         if (questInfo.QuestLocks.Count > 0)
         {
             var completedQuests = questInfo.QuestLocks.Count(x => IsQuestComplete(x) || x.Equals(extraCompletedQuest));
-            if (questInfo.QuestLockJoin == QuestInfo.QuestJoin.All && questInfo.QuestLocks.Count == completedQuests)
+            if (questInfo.QuestLockJoin == EQuestJoin.All && questInfo.QuestLocks.Count == completedQuests)
                 return true;
-            else if (questInfo.QuestLockJoin == QuestInfo.QuestJoin.AtLeastOne && completedQuests > 0)
+            else if (questInfo.QuestLockJoin == EQuestJoin.AtLeastOne && completedQuests > 0)
                 return true;
         }
 
         return false;
     }
 
-    private bool HasCompletedPreviousQuests(QuestInfo questInfo, ElementId? extraCompletedQuest)
+    private bool HasCompletedPreviousQuests(IQuestInfo questInfo, ElementId? extraCompletedQuest)
     {
         if (questInfo.PreviousQuests.Count == 0)
             return true;
 
         var completedQuests = questInfo.PreviousQuests.Count(x =>
             HasEnoughProgressOnPreviousQuest(x) || x.QuestId.Equals(extraCompletedQuest));
-        if (questInfo.PreviousQuestJoin == QuestInfo.QuestJoin.All &&
+        if (questInfo.PreviousQuestJoin == EQuestJoin.All &&
             questInfo.PreviousQuests.Count == completedQuests)
             return true;
-        else if (questInfo.PreviousQuestJoin == QuestInfo.QuestJoin.AtLeastOne && completedQuests > 0)
+        else if (questInfo.PreviousQuestJoin == EQuestJoin.AtLeastOne && completedQuests > 0)
             return true;
         else
             return false;
     }
 
-    private bool HasEnoughProgressOnPreviousQuest(QuestInfo.PreviousQuestInfo previousQuestInfo)
+    private bool HasEnoughProgressOnPreviousQuest(PreviousQuestInfo previousQuestInfo)
     {
         if (IsQuestComplete(previousQuestInfo.QuestId))
             return true;
             return true;
 
         var completedInstances = questInfo.PreviousInstanceContent.Count(x => UIState.IsInstanceContentCompleted(x));
-        if (questInfo.PreviousInstanceContentJoin == QuestInfo.QuestJoin.All &&
+        if (questInfo.PreviousInstanceContentJoin == EQuestJoin.All &&
             questInfo.PreviousInstanceContent.Count == completedInstances)
             return true;
-        else if (questInfo.PreviousInstanceContentJoin == QuestInfo.QuestJoin.AtLeastOne && completedInstances > 0)
+        else if (questInfo.PreviousInstanceContentJoin == EQuestJoin.AtLeastOne && completedInstances > 0)
             return true;
         else
             return false;
 
--- /dev/null
+using System.Diagnostics.CodeAnalysis;
+using JetBrains.Annotations;
+
+namespace Questionable.Model;
+
+[SuppressMessage("Design", "CA1028", Justification = "Game type")]
+[UsedImplicitly(ImplicitUseKindFlags.Assign, ImplicitUseTargetFlags.Members)]
+internal enum EQuestJoin : byte
+{
+    None = 0,
+    All = 1,
+    AtLeastOne = 2,
+}
 
 using System;
 using System.Collections.Generic;
+using System.Collections.Immutable;
 using Dalamud.Game.Text;
 using LLib.GameData;
 using Questionable.Model.Questing;
 
 namespace Questionable.Model;
 
-public interface IQuestInfo
+internal interface IQuestInfo
 {
     public ElementId QuestId { get; }
     public string Name { get; }
     public uint IssuerDataId { get; }
     public bool IsRepeatable { get; }
+    public ImmutableList<PreviousQuestInfo> PreviousQuests { get; }
+    public EQuestJoin PreviousQuestJoin { get; }
     public ushort Level { get; }
     public EAlliedSociety AlliedSociety { get; }
     public uint? JournalGenre { get; }
 
 using System.Collections.Generic;
+using System.Collections.Immutable;
 using LLib.GameData;
 using Lumina.Excel.GeneratedSheets2;
 using Questionable.Model.Questing;
     public ElementId QuestId { get; }
     public string Name { get; }
     public uint IssuerDataId { get; }
+    public ImmutableList<PreviousQuestInfo> PreviousQuests { get; } = [];
+    public EQuestJoin PreviousQuestJoin => EQuestJoin.All;
     public bool IsRepeatable => true;
     public ushort Level { get; }
     public EAlliedSociety AlliedSociety => EAlliedSociety.None;
 
--- /dev/null
+using Questionable.Model.Questing;
+
+namespace Questionable.Model;
+
+internal sealed record PreviousQuestInfo(QuestId QuestId, byte Sequence = 0);
 
                 }
                 .Where(x => x.QuestId.Value != 0)
                 .ToImmutableList();
-        PreviousQuestJoin = (QuestJoin)quest.PreviousQuestJoin;
+        PreviousQuestJoin = (EQuestJoin)quest.PreviousQuestJoin;
         QuestLocks = quest.QuestLock
             .Select(x => new QuestId((ushort)(x.Row & 0xFFFFF)))
             .Where(x => x.Value != 0)
             .ToImmutableList();
-        QuestLockJoin = (QuestJoin)quest.QuestLockJoin;
+        QuestLockJoin = (EQuestJoin)quest.QuestLockJoin;
         JournalGenre = quest.JournalGenre?.Row;
         SortKey = quest.SortKey;
         IsMainScenarioQuest = quest.JournalGenre?.Value?.JournalCategory?.Value?.JournalSection?.Row is 0 or 1;
         CompletesInstantly = quest.TodoParams[0].ToDoCompleteSeq == 0;
         PreviousInstanceContent = quest.InstanceContent.Select(x => (ushort)x.Row).Where(x => x != 0).ToList();
-        PreviousInstanceContentJoin = (QuestJoin)quest.InstanceContentJoin;
+        PreviousInstanceContentJoin = (EQuestJoin)quest.InstanceContentJoin;
         GrandCompany = (GrandCompany)quest.GrandCompany.Row;
         AlliedSociety = (EAlliedSociety)quest.BeastTribe.Row;
         ClassJobs = QuestInfoUtils.AsList(quest.ClassJobCategory0.Value!);
     public uint IssuerDataId { get; }
     public bool IsRepeatable { get; }
     public ImmutableList<PreviousQuestInfo> PreviousQuests { get; private set; }
-    public QuestJoin PreviousQuestJoin { get; }
+    public EQuestJoin PreviousQuestJoin { get; }
     public ImmutableList<QuestId> QuestLocks { get; private set; }
-    public QuestJoin QuestLockJoin { get; private set; }
+    public EQuestJoin QuestLockJoin { get; private set; }
     public List<ushort> PreviousInstanceContent { get; }
-    public QuestJoin PreviousInstanceContentJoin { get; }
+    public EQuestJoin PreviousInstanceContentJoin { get; }
     public uint? JournalGenre { get; }
     public ushort SortKey { get; }
     public bool IsMainScenarioQuest { get; }
     public byte StartingCity { get; set; }
     public EExpansionVersion Expansion { get; }
 
-    [UsedImplicitly(ImplicitUseKindFlags.Assign, ImplicitUseTargetFlags.Members)]
-    public enum QuestJoin : byte
-    {
-        None = 0,
-        All = 1,
-        AtLeastOne = 2,
-    }
-
     public void AddPreviousQuest(PreviousQuestInfo questId)
     {
         PreviousQuests = [..PreviousQuests, questId];
     }
 
-    public void AddQuestLocks(QuestJoin questJoin, params QuestId[] questId)
+    public void AddQuestLocks(EQuestJoin questJoin, params QuestId[] questId)
     {
         if (QuestLocks.Count > 0 && QuestLockJoin != questJoin)
             throw new InvalidOperationException();
         QuestLockJoin = questJoin;
         QuestLocks = [..QuestLocks, ..questId];
     }
-
-    public sealed record PreviousQuestInfo(QuestId QuestId, byte Sequence = 0);
 }
 
 using System.Collections.Generic;
+using System.Collections.Immutable;
 using LLib.GameData;
 using Lumina.Excel.GeneratedSheets;
 using Questionable.Model.Questing;
         Level = npc.LevelUnlock;
         SortKey = QuestId.Value;
         Expansion = (EExpansionVersion)npc.QuestRequired.Value!.Expansion.Row;
+        PreviousQuests = [new PreviousQuestInfo(new QuestId((ushort)(npc.QuestRequired.Row & 0xFFFF)))];
     }
 
     public ElementId QuestId { get; }
     public string Name { get; }
     public uint IssuerDataId { get; }
     public bool IsRepeatable => true;
+    public ImmutableList<PreviousQuestInfo> PreviousQuests { get; }
+    public EQuestJoin PreviousQuestJoin => EQuestJoin.All;
     public ushort Level { get; }
     public EAlliedSociety AlliedSociety => EAlliedSociety.None;
     public uint? JournalGenre => null;
 
 using Questionable.Data;
 using Questionable.Functions;
 using Questionable.Model;
-using Questionable.Model.Questing;
 
 namespace Questionable.Windows.QuestComponents;
 
         _configuration = configuration;
     }
 
-    public void Draw(IQuestInfo quest)
-    {
-        if (quest is QuestInfo questInfo)
-            Draw(questInfo);
-    }
-
-    public void Draw(QuestInfo quest)
+    public void Draw(IQuestInfo questInfo)
     {
         using var tooltip = ImRaii.Tooltip();
         if (tooltip)
         {
-            ImGui.Text($"{SeIconChar.LevelEn.ToIconString()}{quest.Level}");
+            ImGui.Text($"{SeIconChar.LevelEn.ToIconString()}{questInfo.Level}");
             ImGui.SameLine();
 
-            var (color, _, tooltipText) = _uiUtils.GetQuestStyle(quest.QuestId);
+            var (color, _, tooltipText) = _uiUtils.GetQuestStyle(questInfo.QuestId);
             ImGui.TextColored(color, tooltipText);
-            if (quest.IsRepeatable)
+            if (questInfo.IsRepeatable)
             {
                 ImGui.SameLine();
                 ImGui.TextUnformatted("Repeatable");
             }
 
-            if (quest.CompletesInstantly)
+            if (questInfo is QuestInfo { CompletesInstantly: true })
             {
                 ImGui.SameLine();
                 ImGui.TextUnformatted("Instant");
             }
 
-            if (_questRegistry.TryGetQuest(quest.QuestId, out Quest? knownQuest))
+            if (_questRegistry.TryGetQuest(questInfo.QuestId, out Quest? quest))
             {
-                if (knownQuest.Root.Author.Count == 1)
-                    ImGui.Text($"Author: {knownQuest.Root.Author[0]}");
+                if (quest.Root.Author.Count == 1)
+                    ImGui.Text($"Author: {quest.Root.Author[0]}");
                 else
-                    ImGui.Text($"Authors: {string.Join(", ", knownQuest.Root.Author)}");
+                    ImGui.Text($"Authors: {string.Join(", ", quest.Root.Author)}");
             }
             else
             {
                 ImGui.TextUnformatted("NoQuestPath");
             }
 
-            DrawQuestUnlocks(quest, 0);
+            DrawQuestUnlocks(questInfo, 0);
         }
     }
 
-    private void DrawQuestUnlocks(QuestInfo quest, int counter)
+    private void DrawQuestUnlocks(IQuestInfo questInfo, int counter)
     {
         if (counter >= 10)
             return;
 
-        if (counter != 0 && quest.IsMainScenarioQuest)
+        if (counter != 0 && questInfo.IsMainScenarioQuest)
             return;
 
         if (counter > 0)
             ImGui.Indent();
 
-        if (quest.PreviousQuests.Count > 0)
+        if (questInfo.PreviousQuests.Count > 0)
         {
             if (counter == 0)
                 ImGui.Separator();
 
-            if (quest.PreviousQuests.Count > 1)
+            if (questInfo.PreviousQuests.Count > 1)
             {
-                if (quest.PreviousQuestJoin == QuestInfo.QuestJoin.All)
+                if (questInfo.PreviousQuestJoin == EQuestJoin.All)
                     ImGui.Text("Requires all:");
-                else if (quest.PreviousQuestJoin == QuestInfo.QuestJoin.AtLeastOne)
+                else if (questInfo.PreviousQuestJoin == EQuestJoin.AtLeastOne)
                     ImGui.Text("Requires one:");
             }
 
-            foreach (var q in quest.PreviousQuests)
+            foreach (var q in questInfo.PreviousQuests)
             {
                 if (_questData.TryGetQuestInfo(q.QuestId, out var qInfo))
                 {
                     if (!_questRegistry.IsKnownQuest(qInfo.QuestId))
                         iconColor = ImGuiColors.DalamudGrey;
 
-                    _uiUtils.ChecklistItem(FormatQuestUnlockName(qInfo, _questFunctions.IsQuestComplete(q.QuestId) ? byte.MinValue : q.Sequence), iconColor, icon);
+                    _uiUtils.ChecklistItem(
+                        FormatQuestUnlockName(qInfo,
+                            _questFunctions.IsQuestComplete(q.QuestId) ? byte.MinValue : q.Sequence), iconColor, icon);
 
                     if (qInfo is QuestInfo qstInfo && (counter <= 2 || icon != FontAwesomeIcon.Check))
                         DrawQuestUnlocks(qstInfo, counter + 1);
             }
         }
 
-        if (counter == 0 && quest.QuestLocks.Count > 0)
+        if (questInfo is QuestInfo actualQuestInfo)
         {
-            ImGui.Separator();
-            if (quest.QuestLocks.Count > 1)
+            if (counter == 0 && actualQuestInfo.QuestLocks.Count > 0)
             {
-                if (quest.QuestLockJoin == QuestInfo.QuestJoin.All)
-                    ImGui.Text("Blocked by (if all completed):");
-                else if (quest.QuestLockJoin == QuestInfo.QuestJoin.AtLeastOne)
-                    ImGui.Text("Blocked by (if at least completed):");
-            }
-            else
-                ImGui.Text("Blocked by (if completed):");
+                ImGui.Separator();
+                if (actualQuestInfo.QuestLocks.Count > 1)
+                {
+                    if (actualQuestInfo.QuestLockJoin == EQuestJoin.All)
+                        ImGui.Text("Blocked by (if all completed):");
+                    else if (actualQuestInfo.QuestLockJoin == EQuestJoin.AtLeastOne)
+                        ImGui.Text("Blocked by (if at least completed):");
+                }
+                else
+                    ImGui.Text("Blocked by (if completed):");
 
-            foreach (var q in quest.QuestLocks)
-            {
-                var qInfo = _questData.GetQuestInfo(q);
-                var (iconColor, icon, _) = _uiUtils.GetQuestStyle(q);
-                if (!_questRegistry.IsKnownQuest(qInfo.QuestId))
-                    iconColor = ImGuiColors.DalamudGrey;
+                foreach (var q in actualQuestInfo.QuestLocks)
+                {
+                    var qInfo = _questData.GetQuestInfo(q);
+                    var (iconColor, icon, _) = _uiUtils.GetQuestStyle(q);
+                    if (!_questRegistry.IsKnownQuest(qInfo.QuestId))
+                        iconColor = ImGuiColors.DalamudGrey;
 
-                _uiUtils.ChecklistItem(FormatQuestUnlockName(qInfo), iconColor, icon);
+                    _uiUtils.ChecklistItem(FormatQuestUnlockName(qInfo), iconColor, icon);
+                }
             }
-        }
 
-        if (counter == 0 && quest.PreviousInstanceContent.Count > 0)
-        {
-            ImGui.Separator();
-            if (quest.PreviousInstanceContent.Count > 1)
+            if (counter == 0 && actualQuestInfo.PreviousInstanceContent.Count > 0)
             {
-                if (quest.PreviousQuestJoin == QuestInfo.QuestJoin.All)
-                    ImGui.Text("Requires all:");
-                else if (quest.PreviousQuestJoin == QuestInfo.QuestJoin.AtLeastOne)
-                    ImGui.Text("Requires one:");
-            }
-            else
-                ImGui.Text("Requires:");
+                ImGui.Separator();
+                if (actualQuestInfo.PreviousInstanceContent.Count > 1)
+                {
+                    if (questInfo.PreviousQuestJoin == EQuestJoin.All)
+                        ImGui.Text("Requires all:");
+                    else if (questInfo.PreviousQuestJoin == EQuestJoin.AtLeastOne)
+                        ImGui.Text("Requires one:");
+                }
+                else
+                    ImGui.Text("Requires:");
 
-            foreach (var instanceId in quest.PreviousInstanceContent)
-            {
-                string instanceName = _territoryData.GetInstanceName(instanceId) ?? "?";
-                var (iconColor, icon) = UiUtils.GetInstanceStyle(instanceId);
-                _uiUtils.ChecklistItem(instanceName, iconColor, icon);
+                foreach (var instanceId in actualQuestInfo.PreviousInstanceContent)
+                {
+                    string instanceName = _territoryData.GetInstanceName(instanceId) ?? "?";
+                    var (iconColor, icon) = UiUtils.GetInstanceStyle(instanceId);
+                    _uiUtils.ChecklistItem(instanceName, iconColor, icon);
+                }
             }
-        }
 
-        if (counter == 0 && quest.GrandCompany != GrandCompany.None)
-        {
-            ImGui.Separator();
-            string gcName = quest.GrandCompany switch
+            if (counter == 0 && actualQuestInfo.GrandCompany != GrandCompany.None)
             {
-                GrandCompany.Maelstrom => "Maelstrom",
-                GrandCompany.TwinAdder => "Twin Adder",
-                GrandCompany.ImmortalFlames => "Immortal Flames",
-                _ => "None",
-            };
-
-            GrandCompany currentGrandCompany = ~_questFunctions.GetGrandCompany();
-            _uiUtils.ChecklistItem($"Grand Company: {gcName}", quest.GrandCompany == currentGrandCompany);
+                ImGui.Separator();
+                string gcName = actualQuestInfo.GrandCompany switch
+                {
+                    GrandCompany.Maelstrom => "Maelstrom",
+                    GrandCompany.TwinAdder => "Twin Adder",
+                    GrandCompany.ImmortalFlames => "Immortal Flames",
+                    _ => "None",
+                };
+
+                GrandCompany currentGrandCompany = ~_questFunctions.GetGrandCompany();
+                _uiUtils.ChecklistItem($"Grand Company: {gcName}", actualQuestInfo.GrandCompany == currentGrandCompany);
+            }
         }
 
         if (counter > 0)