I like a challenge "OLD GEZZERS". Let's call him Jack ... 72 and shakes worse than a quaking aspen.
I tried to train him with his old beaten up trainer 40 ... I had trouble getting it off the ground it was so bad. He got fed up with me because I wouldn't let him solo ( He had a lot of problems taking off) anyway one day I see him run into the fence twice in a row on take off. He packed up and left. The very next day he came back with a brand new LECTRIC T-28. Got one of the other guys to fly it out and trim it. Next thing He's flying the T-28 doing loops rolls and good landings. Next day he's flying formation with another T-28 ... it wasn't jacks skills it was the PEICE of crap he was trying to fly on. One learns something different every day if U look for it.