Every trainer I've ever flown does not have the tendency to right it self hands off. The reason I ask is, I'm going to build a trainer for my wife to learn to fly, and if at our level of flying(RC models), it does not help stability all that much, why have it. It makes inverted flight very difficult. Why not make a thick wing with low W/L, and an A/R of 5 or 6(like a big stick)? If, in fact, it does help stability, what is the optimal amt?

If I adjust the throws and put a low pitch prop on it, at 1st then re-adjust for aerobatics when she's ready, no need for a second plane.