diff --git a/src/Core.cs b/src/Core.cs
index bc00d39..2c8ec0c 100644
--- a/src/Core.cs
+++ b/src/Core.cs
@@ -6,6 +6,19 @@ namespace D2SLib
 {
     public class Core
     {
+        private static TXT _TXT = null;
+        public static TXT TXT
+        {
+            get
+            {
+                return _TXT ?? ResourceFilesTXT.Instance.TXT;
+            }
+            set
+            {
+                _TXT = value;
+            }
+        }
+
         public static D2S ReadD2S(string path)
         {
             return D2S.Read(File.ReadAllBytes(path));
diff --git a/src/D2SLib.csproj b/src/D2SLib.csproj
index c04ea08..8d15a12 100644
--- a/src/D2SLib.csproj
+++ b/src/D2SLib.csproj
@@ -8,6 +8,9 @@
     <PackageTags>d2s d2i diablo-ii diablo2 d2r</PackageTags>
     <Description>Read and write saves from Diablo 2. Supports versions 1.10 through Diablo II: Resurrected (1.15). Supports both d2s (player saves) and d2i (shared stash).</Description>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+    <RepositoryUrl>https://github.com/dschu012/D2SLib</RepositoryUrl>
+    <RepositoryType>git</RepositoryType>
+    <Version>1.0.1</Version>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/Model/Save/Attributes.cs b/src/Model/Save/Attributes.cs
index 164bdcf..43ac123 100644
--- a/src/Model/Save/Attributes.cs
+++ b/src/Model/Save/Attributes.cs
@@ -14,7 +14,7 @@ public class Attributes
 
         public static Attributes Read(BitReader reader)
         {
-            ItemStatCostTXT itemStatCost = ResourceFilesTXT.Instance.TXT.ItemStatCost;
+            ItemStatCostTXT itemStatCost = Core.TXT.ItemStatCostTXT;
             Attributes attributes = new Attributes();
             attributes.Header = reader.ReadUInt16();
             UInt16 id = reader.ReadUInt16(9);
@@ -37,7 +37,7 @@ public static byte[] Write(Attributes attributes)
         {
             using (BitWriter writer = new BitWriter())
             {
-                ItemStatCostTXT itemStatCost = ResourceFilesTXT.Instance.TXT.ItemStatCost;
+                ItemStatCostTXT itemStatCost = Core.TXT.ItemStatCostTXT;
                 writer.WriteUInt16(attributes.Header ?? (UInt16)0x6667);
                 foreach (var entry in attributes.Stats)
                 {
diff --git a/src/Model/Save/Items.cs b/src/Model/Save/Items.cs
index c70818e..bb730a6 100644
--- a/src/Model/Save/Items.cs
+++ b/src/Model/Save/Items.cs
@@ -238,7 +238,7 @@ protected static void ReadCompact(BitReader reader, Item item, UInt32 version)
                 {
                     for(int i = 0; i < 4; i++)
                     {
-                        item.Code += ResourceFilesTXT.Instance.TXT.ItemsTXT.ItemCodeTree.DecodeChar(reader);
+                        item.Code += Core.TXT.ItemsTXT.ItemCodeTree.DecodeChar(reader);
                     }
                 }
                 item.NumberOfSocketedItems = reader.ReadByte(item.IsCompact ? 1 : 3);
@@ -295,7 +295,7 @@ protected static void WriteCompact(BitWriter writer, Item item, UInt32 version)
                 {
                     for (int i = 0; i < 4; i++)
                     {
-                        BitArray bits = ResourceFilesTXT.Instance.TXT.ItemsTXT.ItemCodeTree.EncodeChar((char)code[i]);
+                        BitArray bits = Core.TXT.ItemsTXT.ItemCodeTree.EncodeChar((char)code[i]);
                         foreach (var bit in bits.Cast<bool>())
                         {
                             writer.WriteBit(bit);
@@ -374,10 +374,10 @@ protected static void ReadComplete(BitReader reader, Item item, UInt32 version)
             {
                 reader.ReadBits(96);
             }
-            ItemStatCostTXT itemStatCostTXT = ResourceFilesTXT.Instance.TXT.ItemStatCost;
-            TXTRow row = ResourceFilesTXT.Instance.TXT.ItemsTXT.GetByCode(item.Code);
-            bool isArmor = ResourceFilesTXT.Instance.TXT.ItemsTXT.IsArmor(item.Code);
-            bool isWeapon = ResourceFilesTXT.Instance.TXT.ItemsTXT.IsWeapon(item.Code);
+            ItemStatCostTXT itemStatCostTXT = Core.TXT.ItemStatCostTXT;
+            TXTRow row = Core.TXT.ItemsTXT.GetByCode(item.Code);
+            bool isArmor = Core.TXT.ItemsTXT.IsArmor(item.Code);
+            bool isWeapon = Core.TXT.ItemsTXT.IsWeapon(item.Code);
             bool isStackable = row["stackable"].ToBool();
             if (isArmor)
             {
@@ -492,10 +492,10 @@ protected static void WriteComplete(BitWriter writer, Item item, UInt32 version)
             {
                 //todo 96 bits
             }
-            ItemStatCostTXT itemStatCostTXT = ResourceFilesTXT.Instance.TXT.ItemStatCost;
-            TXTRow row = ResourceFilesTXT.Instance.TXT.ItemsTXT.GetByCode(item.Code);
-            bool isArmor = ResourceFilesTXT.Instance.TXT.ItemsTXT.IsArmor(item.Code);
-            bool isWeapon = ResourceFilesTXT.Instance.TXT.ItemsTXT.IsWeapon(item.Code);
+            ItemStatCostTXT itemStatCostTXT = Core.TXT.ItemStatCostTXT;
+            TXTRow row = Core.TXT.ItemsTXT.GetByCode(item.Code);
+            bool isArmor = Core.TXT.ItemsTXT.IsArmor(item.Code);
+            bool isWeapon = Core.TXT.ItemsTXT.IsWeapon(item.Code);
             bool isStackable = row["stackable"].ToBool();
             if (isArmor)
             {
@@ -614,7 +614,7 @@ public class ItemStat
         public static ItemStat Read(BitReader reader, UInt16 id)
         {
             ItemStat itemStat = new ItemStat();
-            TXTRow property = ResourceFilesTXT.Instance.TXT.ItemStatCost[id];
+            TXTRow property = Core.TXT.ItemStatCostTXT[id];
             if (property == null)
             {
                 throw new Exception($"No ItemStatCost record found for id: {id} at bit {reader.Position - 9}");
@@ -728,11 +728,11 @@ public static TXTRow GetStatRow(ItemStat stat)
         {
             if (stat.Id != null)
             {
-                return ResourceFilesTXT.Instance.TXT.ItemStatCost[(UInt16)stat.Id];
+                return Core.TXT.ItemStatCostTXT[(UInt16)stat.Id];
             }
             else
             {
-                return ResourceFilesTXT.Instance.TXT.ItemStatCost[(string)stat.Stat];
+                return Core.TXT.ItemStatCostTXT[(string)stat.Stat];
             }
         }
 
diff --git a/src/Model/TXT/ItemsTXT.cs b/src/Model/TXT/ItemsTXT.cs
index c884fa1..83648b8 100644
--- a/src/Model/TXT/ItemsTXT.cs
+++ b/src/Model/TXT/ItemsTXT.cs
@@ -14,7 +14,23 @@ public class ItemsTXT
         public ArmorTXT ArmorTXT {get; set;}
         public WeaponsTXT WeaponsTXT { get; set; }
         public MiscTXT MiscTXT { get; set; }
-        public HuffmanTree ItemCodeTree { get; set; }
+
+        private HuffmanTree _ItemCodeTree = null;
+        public HuffmanTree ItemCodeTree
+        {
+            get
+            {
+                if(_ItemCodeTree == null)
+                {
+                    _ItemCodeTree = InitializeHuffmanTree();
+                }
+                return _ItemCodeTree;
+            }
+            set
+            {
+                _ItemCodeTree = value;
+            }
+        }
 
         public TXTRow this[string i] => this.GetByCode(i);
 
@@ -40,7 +56,7 @@ public bool IsMisc(string code)
             return MiscTXT[code] != null;
         }
 
-        public void InitializeHuffmanTree()
+        private HuffmanTree InitializeHuffmanTree()
         {
             /*
             List<string> items = new List<string>();
@@ -57,8 +73,9 @@ public void InitializeHuffmanTree()
                 items.Add(row["code"]);
             }
             */
-            ItemCodeTree = new HuffmanTree();
-            ItemCodeTree.Build(new List<string>());
+            var itemCodeTree = new HuffmanTree();
+            itemCodeTree.Build(new List<string>());
+            return itemCodeTree;
         }
 
     }
diff --git a/src/ResourceFilesTXT.cs b/src/ResourceFilesTXT.cs
index bfb2c64..e45552d 100644
--- a/src/ResourceFilesTXT.cs
+++ b/src/ResourceFilesTXT.cs
@@ -19,9 +19,8 @@ private static ResourceFilesTXT Init()
             ResourceFilesTXT resourceFilesTXT = new ResourceFilesTXT();
             resourceFilesTXT.TXT = new TXT();
             using(Stream s = GetResource("ItemStatCost.txt")) {
-                resourceFilesTXT.TXT.ItemStatCost = ItemStatCostTXT.Read(s);
+                resourceFilesTXT.TXT.ItemStatCostTXT = ItemStatCostTXT.Read(s);
             }
-            resourceFilesTXT.TXT.ItemsTXT = new ItemsTXT();
             using (Stream s = GetResource("Armor.txt"))
             {
                 resourceFilesTXT.TXT.ItemsTXT.ArmorTXT = ArmorTXT.Read(s);
@@ -34,8 +33,6 @@ private static ResourceFilesTXT Init()
             {
                 resourceFilesTXT.TXT.ItemsTXT.MiscTXT = MiscTXT.Read(s);
             }
-            resourceFilesTXT.TXT.ItemsTXT.InitializeHuffmanTree();
-
             return resourceFilesTXT;
         }
 
diff --git a/src/TXT.cs b/src/TXT.cs
index 64e3fd5..a6e0ec9 100644
--- a/src/TXT.cs
+++ b/src/TXT.cs
@@ -7,7 +7,22 @@ namespace D2SLib
 {
     public class TXT
     {
-        public ItemStatCostTXT ItemStatCost { get; set; }
-        public ItemsTXT ItemsTXT { get; set; }
+        public ItemStatCostTXT ItemStatCostTXT { get; set; }
+        private ItemsTXT _ItemsTXT = null;
+        public ItemsTXT ItemsTXT
+        {
+            get
+            {
+                if(_ItemsTXT == null)
+                {
+                    _ItemsTXT = new ItemsTXT();
+                }
+                return _ItemsTXT;
+            }
+            set
+            {
+                _ItemsTXT = value;
+            }
+        }
     }
 }
diff --git a/test/D2STest.cs b/test/D2STest.cs
index bd0fc0f..7252439 100644
--- a/test/D2STest.cs
+++ b/test/D2STest.cs
@@ -1,5 +1,6 @@
 using D2SLib;
 using D2SLib.Model.Save;
+using D2SLib.Model.TXT;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 using System;
 using System.IO;
@@ -22,7 +23,6 @@ public void VerifyCanReadSimple115Save()
         public void VerifyCanReadComplex115Save()
         {
             D2S character = Core.ReadD2S(File.ReadAllBytes(@"Resources\D2S\1.15\DannyIsGreat.d2s"));
-            character.ClassSkills.Skills.ForEach(skill => skill.Points = 20);
             Assert.IsTrue(character.Name == "DannyIsGreat");
             Assert.IsTrue(character.ClassId == 0x1);
             /*
@@ -44,5 +44,6 @@ public void VerifyCanWriteComplex115Save()
             //File.WriteAllBytes(Environment.ExpandEnvironmentVariables($"%userprofile%/Saved Games/Diablo II Resurrected Tech Alpha/{character.Name}.d2s"), ret);
             Assert.IsTrue(input.Length == ret.Length);
         }
+
     }
 }