what bird is running the show for the 3d stuff that i can slap my OS-91 on?

Cost?
Birds Strong Point?
Who sells them?

I have that engine on my .90 Aeroworks edge. You will probably have to get the in cowl tuned muffler from Jett engineering though to give it unlimited vertical. The only problem i've had is sometimes the engine overheats with the cowl on. But you can baffle the cowl to solve this problem. The plane 3Ds pretty good, though don't expect the high alpha stability of your 29% edge.

Greg

I don't have one but the GP U-can-do with a .91fx is supposed to be a good low cost 3-D setup.

seagull razzle, flip or u can do