As a fisherman I spend many hours lakeside with not a massive amount to do other than ponder and I got to thinking about the black art of spring gun tuning and all and sundry that goes with it and in particular transfer ports. Now there's a lot of balancing going on with all the factors within a spring gun tune of which the transfer port is one of these and wondered if anyone had played around with a venturi screw, as per a pcp, within the port? Could it settle a gun that has potential but suffers with piston slam? Would it be able to fine tune power without tinkering internally? Could it be another variable to confuse matters further???? Or am I barking up the wrong tree completely?