I had purchased a new skin for the trim tab as my first attempt was not up to my standards. So I spent 4 hours replacing the skin; and then found that I had bent the end tabs on the wrong line. Why is it there is always something that continues to haunt you. The trim tab poses a lot of problems for a lot folks building these. I am just one of the many. I will order more trim tab parts. I think I have it figured out now and should be able to produce a professional looking tab.