Currently to my knowledge, there is no simple button method for compiling a model from FBX for CSGO (for the purposes of having a 2nd UV), this would be an incredible feature and would to my knowledge make other methods of compiling models obsolete.
You're right, I've been putting this off for far too long.
I made a first draft on the fbx branch just now.
It's still pretty rough around the edges but I think I'll manage.
Currently to my knowledge, there is no simple button method for compiling a model from FBX for CSGO (for the purposes of having a 2nd UV), this would be an incredible feature and would to my knowledge make other methods of compiling models obsolete.