I need to visit Xtreme myself, I've always went to Wacky's in Milstadt and when I'm desperate and don't feel like driving so far I go down the street to Meramec Challenge if the field hasn't washed down the river.
I've many good things about Xtreme.
08 Proto SLG: Ultralight Trigger, Freak Barrel, Featherlight Microswitch, Spring Detents, New Designz Feedneck. Plans for 7th Element board.
05 Smart Parts Impulse: NDZ Trigger, Blackheart board, Tapeworm, Evil Punch Kit. Plans for a low profile feedneck, Evil internals and respirator.