there are several techs in the valley that know what they are doing and could help you get this gun up to par.
east valley, mesa,gilbert and such:
warlord, green listerine, nuke duster, dust to dust
slinkey is in the metro center area
and im located in the west valley and there are a couple of other techs on here that i have probly missed. if they want to take on this project they will speak up.
i will tell you this though. there is probly only one person in az with as much experience working on the p90 platform as me.