I manufactured some rocker gun buttons a few years back and mounted to a spade grip via a burnt Russian Hurricaine air valve assy. Two points struck me...the grip is suited to right handed pilots and I wonder if the casualty figures show a bias re lefties. The second is the pneumatic gun firing and attendant thick air hoses running up the column for the gun, this must have stiffened the control feel a tad. The rocker operated two schrader type air valves and were at the precision end for machining. Considering all that thick tubing running down the column, round the cockpit, and out to the gunbays, where one nick disarms the lot, why not electrical firing?