Bigger is better. Really I'd rather train on a Robin Hood 80 or 99. But since you dont list those the .60 size is next
with .40-46 size last. We trained a ton of students the past two summers on Hobbico 40 size trainers. Have a love hate relationship with them. Good planes but motor, plane combo's sucked big time. That .40La is the worst engine known to man. I dont know why OS went to the LA engines.........gimics I guess.

That's my story and I'm stick'n to it.

JDS