http://www.airsoftcanada.com/showthread.php?t=67580
Thats what I want to do to it, basically. Thanks for the "keep-it-to-one-brand" tip for internals, completely makes sense.
I'm guessing the factory stock TM hop up unit will need to be replaced, I'm checking out BB bastard's site for heavier .28g BBs, as you mentioned. Madbull make good tightbore barrels from what I've heard, but I don't know what's available for my G36C.