RE: How to handle the guys with flawed plans?
Well, the Banana Hobby' product doesn't look like a trainer ... but it might fly like one. I'm only speculating, of course, 'cos I've never handled one of those models.
Doesn't a well-known firm make a P-51 which they classify as a trainer?
I mean, why fly a "box" if you can fly something attractive, for the same price?