Nice one mate! Have you tried it with the parachute harness as well? If not, you'll feel even more restricted. My nearest experience to that was an hour in a Chipmunk, front seat, with the canopy open. Being RAF, I had the 'chute, life jacket and bone dome, with the seat harness slightly slack on the left shoulder, and we were doing mild aerobatics whilst photogrpahing the BBMF. I dropped a lens cap, so had to keep one foot on it, in case it got caught in the rudder pedals or the stick and, by the time we landed, I could hardly climb out of the cockpit. Gawd knows what it must have been like with all the rest of the clobber on, throwing the crate around the sky violently !