Todd, with only a shrinker/stretcher available, doing two "L"s and welding together is about the only way I know of to end up with a "U" channel. That is how I will probably make the weatherstrip channel on my roadster. I could do a U channel on the Pmax or Eckold but getting the shape perfect in 3 dimensions would be a real exercise in frustration.
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Kerry Pinkerton
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