I've just finished making heavy changes both to Support_Prefs and my own client gui so that my pref system is compatible with glass and glass is compatible with my pref system. Support_Prefs has a few more features as a result but registering values shouldn't be too different.stuff nevermind
Combining the mods has had big benefit on both sides. A lot of annoying bugs I had with my prefs system are fixed by your code and vice versa.
I'm slightly worried that your GUI are moving too far from the "Modernized Blockland" theme that RTB and Slayer manage. Blockland's GUI are already extremely mismatched in a lot of places (start a game gui, minigames, main menu etc) and I think you should try to make that better, not worse.
