Just flat surfaces when folding - the beater put a little curvature in the top face - but it was v mild.
Yes that's the joy of restoring - that car - 2 a pillars, 2 floor sections, 2 sills, vent panel front and rear, tail light panel, repairs to quarters, "new" guards, front sub frame, boot floor repair etc etc - but it's turned out t b a straight shell with v little bog. He measured it all up - no distortion worth speaking of - another one salvaged. V satisfying ...