OK, it might cost you 42 cents for a stamp to send a drawing. We have a problem with reproduction window felt channels wanting to bend unevenly and the sides flaring out so the window trim ring is hard to put on. I fabricated this from scrap wood and it works great. The one pictured is for a 47-50 so the center piece is 0.350 to fit the metal frame around the window. For the 51-55.1 the center piece would be 0.250 to fit the glass. A plastic hammer seems to work the best to form the felt channel to the pattern--note the very even wrinkles on the sides of the channel with the 90 degree bend.