I'm just gonna use the BFH and wack the crap out of the flanges. Do you suppose there is such a thing as too far back?
Uh, Yeah, I would say there is such a thing... Try the LBFH. Or, try a 1/4" extension between the top and bottom, and gently tighten to achieve the desired warp.
I may say rude things but learn to take a joke. The internet is funny when you can laugh.