I'm using an old Sig Kadet Mk. II with OS 40 FP to train. It's an odd one because it has a foam wing with no ailerons. Tx is set up with rudder on right stick AND left stick so you can taxi and take off with left stick and fly with right. It flies nice and slow at a little under half throttle. I can see where a Senior, Senorita, or LT could be even better, but it works great and students seem to like it.

Jim