My aerobatic e planes range from 15 to 30 inch spans, and all are simple (cheap) brushed setups. My D.U.F.F. is 28 inch S300 geared that 3D's on 7 600AE's (plane will tie itself up in knots), my Nuthin' Extra won't 3D but handles most aerobatics, it's 30 inch, all pink foam. S400. On 4 600AE's it's a good aileron trainer that'll loop and roll, on 8 600AE's it really rocks. My 15 inch Acro Bipe uses the GWS Lite Stick motor DD and it's a hoot, just need to drink a lot of coffee before I fly it.

Mike