when you change carrier o-rings, you have to go through the adjustment process again of finding the largest carrier that doesn't leak.
1) 3 drops of oil into valve. Could be a dry oring.
2) REPLACE powertube oring. If that doesn't help...
3) add in shim to the carrier if not
Thanks got a deal on going at the moment but AO member may still looking for one name of
paintball4lyfe32 see if he's still interested.