RE: Split Flaps Construction Issue:
Go Navy!
I have an old flop tite Hollywood Zero (built some time around 1991, 240 flights) with this problem. I have a Pica Focke Wulf (built 1983, 210flights)with splitt flaps and no problems. The FW has 1/64 ply under the sheeting the full length of the flaps, and from the TE to two inches ahead of theflap hinge point. This plane has no internal suports (not needed). The Zero is built to plans with a 1/2 inch width of 1/64 the full length of the flap. the TE on the Zero looks like a lezonia noodle.
Joe