I think the ideal Setup on the Mojo-40 is: SA-.82 (or similar 4 stroke) for that instant punch-out (thrust) that a 2 stroke cannot match. Durable fast servos @ >50oz, a 6 volt battery for added servo speed & torque, and most ipmortaint very good linkages and setup (Carbon fiber push rods, ball joints, good control arms with thin CA hardened balsa where the control horns are placed, or build reinforcment around the horn.) If you fly the mojo the way it was intended you will be "touching" all of the control serfaces on the ground on a regular basis. Standard 4-40 rod, 40 size horns, and clevisis will not last or will become sloppy in a hurry.