GUIStudio is a compiler. When decompiling CS Source models, Crowbar automatically rotates them. So yea, I think it treats CS 1.6 models differently.

I thought Crowbar automatically rotates the animations when decompiling?

My real name spelt backward (NOS part), other two letters are the first letter of my middle and last name. Added dots between them to make it looks cooler. Came up with this about a year ago i guess, before i use whatever i can come up with but now i stick to this one.