C5, I'm going to go a little against the grain here and suggest you get a set of plans for a proven trainer and build it from scratch. You're obviously interested in designing and building your own future designs. Working from scratch but with a set of proven plans will excercise your wood working skills and establish your tools and building practices much better than merely assembling a kit.

And for what it's worth I've currently got a Futaba, a JR and a Hitec that are all older than 10 years and all are still working just fine. Gone through a few battery packs though......

For that matter my old Controlair galloping ghost rig still works too for those of you old enough to remember them.......