Never taken it fully apart taken the bolt out for maintanance thats about it and taken the grips off thats itAye - have you taken the marker apart? Seen something similar when someone had pinched the eye cable. Other thing you can do, is remove the eyes, connect them to the board and line them up loose and put your finger between them - see if they turn on and off to simulate a ball in the breach.
Also, any gunk in the eye hole area?
it does puff have tried putting the velocity fully down and turned it back 2 turns havnt tried shooting and turning at the same time and dont know how to do that last thing you said sorry not used to demons yetOK - so the bolt doesn't move when you press the trigger? Does it 'puff'.
Have you zero'd in the reg (decreased velocity all the way, then turn it 2 full turns out, keep firing and slowly turn it another 1/2-1 turn - does it cycle?)?
Have you checked the diaphragm for any problems?