RE: Super Sportster 60
I flew my Sportster with a Saito .91 4 stroker which puts out about the same amount of power as a .82. It had unlimited vertical while doing aileron rolls so I don't know why you would require more power unless you enlarge all control surfaces in an effort to turn it into a 3D machine. But the dihedral would not be good for that. I have recommended before if using the stock wing gear as a tail dragger to reenforce the hardwood blocks with some light ply to keep them from splitting. The wire torque inside those blocks can split them along the grain. Also widen out the two elevators to give your rudder more room to swing. This will require a new wire joiner and some reshaping of the elevators themselves....