I just had an issue with a new Phantom and a UC kit-- the pump arm was rubbing against the screw for the UC kit. I had to reassemble the gun a few times in order for it to run smoothly. If I get really impatient I'll file a little of the pump arm away where it's touching the the UC kit screw.
The return spring still will not overcome a red mainspring, though. :P
Last edited by NotBrian; 12-08-2012 at 04:18 PM.