Foxx I appreciate your view point but if memory serves.. the full scale spit has a manuel canopy. So.. he would be authentic from that stand point. I dont think its too much of a challange for the spitfire to have it operated via an air valve.
Cub-boy.. mount an air valve in the aft portion of the fuse.. behind the canopy.. attach the push/pull rods to the canopy sliders, both sides. Just keep them inline so they dont bind.. putting sliders at the front and rear of the sliding canopy will help keep it from twisting.. you will have a 4 point attachment (2 per side). That may be close to what you already have?.. Regards BobH.