Barry
To make the elevators as one piece is a great idea, even built up ones could be done this way with a little bit of forethought!
As for the DVa you were correct the wings were twisting resulting in an ever-tightening turn that was virtually impossible to get out of. My first reaction was to increase speed as I thought it was a tip stall, this of course was the worst thing I could do in the circumstances. If I’d done a better job of researching the project (hence the sub title) I would have discovered that the full size had the same problem, also how they corrected it, then I could have included the modification on the original model and saved myself a lot of heartache. If you check the
DVa thread I’ve put a link to a site describing the development from D1 to DVa. My only excuse is that at that time I didn’t have access to the Internet, now research a lot easier.
Grahame