RE: .25 trainer
I built an LT-25 just for something to do one winter a couple of years ago. A friend donated the covering. It was an easy, fun build.
I put a .32 GMS engine and pieced together a flight pack (tower servos, hi-tech rx, etc.).
I really like the way it flies. Much better than the LT-40 I learned on.
I've sort of "moved on" but I've kept the LT-25 and a buddy box thinking I may want to teach someone how to fly RC.
A great little high wing, tail dragging trainer.
Dave