My side windows in my 42 1 1/2 ton have a felt material in the metal channels that hold the window. The side windows I had made at a local shop are a little thicker and seem tight. Is there another type of sealer or do you just take out the original felt and force it in with the window? Also, the door has a couple pieces of thicker felt, almost a quarter of an inch thick on the side of the window to act as wipes i guess. They are apparently held in place by crimping the metal channel on them. Anyone have a source for that thickness felt?