And, IMHO, "pressurising" the fuselage with all the cooling air coming in the front (my theory anyway). Mine is an i/c setup and I took care to make sure ALL the holes into the fuz were closed (even the one in the front of the canopy frame). I've been fairly enthusiastic with my flying, including K/E loops, double negative snaps, etc, and SO FAR................it's stayed put! (fingers crossed and all!)
Bill.