For the OS and thunder tiger 46's a 4* 40, SIG Something Extra, Hangar 9 twist, Great Planes Super Sportster and a host of other 40 size planes.

The 4*60 will work with the Saito 82 It will be nice and tame and will have not allot of extra power but it will do fine for just general flying around and normal aerobatics. Once you decide you want more power the Saito 100 or the OS91 are great 4-strokes for the 4*60.