Those will fill a few idle hours... Now, about those alleged turnbuckles on the aileron control cables. I've peered closely at all of the Wingnut Wings period reference photos and, truthfully, can't see any, much as I try. I suspect they aren't in the open, if they exist, and I don't see how they wouldn't have accommodated some adjustments in the cables. Maybe inside the wings or at the control column?
If you get a chance...
Thanks,