My 2.5 cents worth is study videos, use the forum for help and get the CZ armorors (spelling ?) I've done my first P01 with the PRO CGW KIT AND 10X bushing. Then on my second PO1 I went the 85C trigger and 1485T disconnector. Didn't like the result, installed the Defensive Carry kit and 10X bushing and I wasn't happy so I then installed the RRK AND NOW I AM HAPPY....What I have is a PRO CGW equiped pair of PO1s.