We are reusing the original glass.The window felt slots can be punched wrong. The two photos below show the slots punched at different heights. That little bit of variance makes a big difference how the window felt fits.
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Are you going to use reproduction glass? My reproduction door glass did not have a pronounced curve like the original glass. I had to cut the top of the door and move the felt closer to the glass.
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Miss Katie, you might be able to bend the door skin and the frame just a little to make the felt fit close to the reproduction glass before you weld the skin in place.