This may sound crazy but you might also consider a Kadet Sr. It is more of a builders kit than most other trainers, it's large enough for a small gas engine or larger electric and, best of all, can be adapted into many configurations. Since it's pretty much all stick construction aft of the wing, it might be an option, especially if you lower the dihedral and change the wing to a semi-symmetrical airfoil instead of flat bottomed like it's designed. Just a thought