Now I'm tempted. I may have to pick one up when the aerotech yak is finished. For the weight sake, I may give up slimline pitts and go with da stock muffler to save another 1/4lb. With lipos, cf spinner 13.5lb may even be possible. wow! that is in the league of Pacific aero edge 540 (i think it was 82" ) at 13.5lb with da50 with slimline pitts.