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How do you repair or replace completely missing flap wiper? Wiper is completely missing from one of my Vampire flaps. I'm looking for methods to sort this. To replace it, I thought to use a piece of suitable tube. The flap depth is about 10mm so a tube of about 20mm dia would do it and this is provided by plastic overflow pipe which is 3/4" or 19mm dia. I cut a sample piece and routered a rebate, then sent it down a band saw to cut it to width. 2 or 3 problems. The rebate angle is wrong and the wiper would not sit tangential to (or below) the upper surface of the flap and when cut from the tube, it bends If I managed to get the rebate angle right, the remaining problem would be - how on earth do I get it to sit in the opening correctly so's it can be stuck to the top, inside of the flap. Do I really need to go to all this trouble? Would a piece of sticky clear plastic stuck on and hanging over the wing back edge be sufficient if it just covers the opening under normal flying flap up/down deflection. I guess that when the flaps are lowered for landing, a big gap does not matter much.