I don't call any Nostalgia profile crummy, probably more authentic as to what was actually flown back in the day. Just add adjustable trim tabs on both outer wings and tweak as necessary. Looks good...really.

Joe,
Heat your stove oven to 350 degrees, with gloves on stick a wing in until it begins to sag a bit then twist it to straighten. works with silk, monocote and other polyester covering. correct the remaining warp with trim tabs as suggested Some people use a heat gun but I think the oven is easier

On further looking the plane has a major building error.  The "I" beam is made in 2 pieces that fit into a notch that one cuts in the top of the fuse. Somehow the outboard beam was epoxied in at a different angle than the inboard side.  Perhaps I didn't cut the bottom of the notch straight, or the beam shifted during the drying.  In any case that is the problem, not warpage.  How I overlooked the problem has to be blamed on impending senility. "Hey joe, leave out the word impending and you just might be right", said a good pal of mine.  I will attempt the insertion of bendable small aerolons, which just might solve the problem.  If that doesn't work I will destroy the wings and rebuild something easier.
Joe

Joe,

Why not use it as an asymmetrical test bed, the BV 141 flew very well, and there have been many others, even some models like the wun wing gon.
Model building can sure be a vixon.
John