Igor Panchenko flies a Saito 56 in a self designed full fuse stunter, its rather unique in its setup, he turns around 6500 rpm with a 8 or 10 pitch prop. it just chugs around like a tractor, quite a site to behold. If you went by sound you would think he didnt get the needle, but boy it does fly well! I think thats probably the plane Floyd is refering too. As for the Cardinal, I suppose you could but talk about power to excess? I am sure you would have to shorten the nose a substantial amount to even get close to balance. Personaly I think the Saito 40a would be better but,, what the heck,,what altitude do you fly at. above sea level, I know it the summer when its 95 and I am at 2700 feet ASL more power isnt all that bad a thing!