I gotta go with Al.
I got a 12 year old boy to solo all on his own with that bug trainer.
I just had him doing circles for a while.
I told him to go ahead and do a loop.
All he got from me was verbal instructions.
When he did that loop he had such a big smile I couldn't see his face.
He took it down a bit on the hi speed side but he trimed the throttle back with no word or any assistance from me and made a beautiful landing
Thats another good part of this hobby