hello.
You might want to try stripping it and carefully polish all of the internals that rub together and the bolt. Maybe see if you can lighten the bolt by drilling it etc, the old cocker bolts used to be heavy till they machined them down.
The trigger pull on these is very long, you need to shorten/lighten it.
The trigger sear is important, but see if you can remove some material with a fine stone, very fine. make sure you can get a replacement if you need to!
This kind of thing can work wonders, try assisting the sear with springs on the trigger etc.
Then you can get the upgrades from Tippman.
Hope this helps