Thanks for the input Ollie...it sounds like you are recommending that I build in true split flaps versus the spoilers suggested in the cited article. I can do this but it's more work than I was planning/hoping to do (and make it look halfway decent).

If I were to not shorten the aileron, but make a flap just on the wing root, it would be 8.5" long (for a 32" wing panel, 72" wingspan). While probably not optimal, would it provide some low speed lift so I don't have to gut my wing, particularly if I make it graze the fuse sides as suggested?

This would obviously be far easier and less intrusive on the completed wing if it would be "enough" (clearly a subjective term). I'm not a novice flyer and usually land hot, but would like some margin based on the feedback I've received on this bird.

Thanks again!