diff --git a/gts/pkvldtprod.ashx.cs b/gts/pkvldtprod.ashx.cs
index 4a1e75cf..cff78159 100644
--- a/gts/pkvldtprod.ashx.cs
+++ b/gts/pkvldtprod.ashx.cs
@@ -55,6 +55,8 @@ namespace PkmnFoundations.GTS
                 case RequestType.BattleSubway:
                     {
                         // todo: Need more info on this structure
+                        // todo: Perform actual validation here so that we can
+                        // error out before the player actually does their challenge
                     } break;
                 */
                 // todo: there also appears to be a Battle Video request?
@@ -90,7 +92,9 @@ namespace PkmnFoundations.GTS
             }
             // placeholder for signature.
             // Should be 128 bytes of an unknown hashing/signing algorithm
-            context.Response.OutputStream.Write(new byte[128], 0, 128);
+            context.Response.Write("Hey this is a totally legit pkvldtprod signature pwease accept it uwu");
+            context.Response.OutputStream.Write(new byte[69], 0, 69); // nice
+            //context.Response.OutputStream.Write(new byte[128], 0, 128);
         }
 
         private enum PartyValidationResult : byte
diff --git a/gts/pokemondpds.ashx.cs b/gts/pokemondpds.ashx.cs
index 56b66b2c..260dce39 100644
--- a/gts/pokemondpds.ashx.cs
+++ b/gts/pokemondpds.ashx.cs
@@ -674,6 +674,9 @@ namespace PkmnFoundations.GTS
 
                     foreach (var p in record.Party)
                     {
+                        // todo: add battle tower specific checks:
+                        // item clause, species clause, banned species, banned items
+                        // https://bulbapedia.bulbagarden.net/wiki/Battle_Tower_(Sinnoh)#Restrictions
                         if (!p.Validate().IsValid)
                         {
                             // Tell the client it was successful so they don't keep retrying.
diff --git a/gts/syachi2ds.ashx.cs b/gts/syachi2ds.ashx.cs
index af7bae49..3ab1aef2 100644
--- a/gts/syachi2ds.ashx.cs
+++ b/gts/syachi2ds.ashx.cs
@@ -577,6 +577,9 @@ namespace PkmnFoundations.GTS
 
                     foreach (var p in record.Party)
                     {
+                        // todo: add battle tower specific checks:
+                        // item clause, species clause, banned species, banned items
+                        // https://bulbapedia.bulbagarden.net/wiki/Battle_Subway#Restrictions
                         if (!p.Validate().IsValid)
                         {
                             // Tell the client it was successful so they don't keep retrying.
diff --git a/library/Structures/DressupRecord4.cs b/library/Structures/DressupRecord4.cs
index d3657353..9c471864 100644
--- a/library/Structures/DressupRecord4.cs
+++ b/library/Structures/DressupRecord4.cs
@@ -39,6 +39,8 @@ namespace PkmnFoundations.Structures
         public int PID { get; set; }
         public ulong SerialNumber { get; set; }
 
+        // todo: Document this data structure.
+        // List of decorations: https://projectpokemon.org/rawdb/diamond/msg/338.php
         private byte[] m_data;
         public byte[] Data
         {