Alan wrote: A) replace the rear spar making one out of thicker alloy sheet metal.
Humm, Reminds me of the WW1 Fokker fighter. I can't remember if it was the eindecker or the D8. It was having problems with shedding wings when pulling out of the dive and pulling g's. The monoplane wing was designed to have a specific amount of flex. However, since the monoplane idea was new, the purchasing board required that the builders beef-up the rear spar because it looked too flimsy. Hence, in a high g pull-up, the front spar flexed the desired amount and the rear flexed not at all. So the wings developed a higher angle of attack than they should have, developed yet more g's and broke off. I know we're not going to willingly pull the kind of g's that a WW1 fighter plane would deliberately pull. However, personally, I'd keep my spars to the original design. Just my superstitious self, so to speak. Ed (Suspenders, belt and a piece of rope in my pocket.)
