RE: what do you do with your old trainer
I had 3 trainers, all in perfect flying condition.
I still have one I will be letting a neighbor use to learn on.
I gave one to a neighbor kid.(he seems to have lost interest but his dad soloed 3 weeks ago and is a new flying buddy, funny how things work out)
I traded one (My favorite, SIG Kadet Senior. I built from a box of sticks) to another club member for a RTF 40 size SE-5