as was suggested I checked the bars on my gleaner and the one on the door is shot but the others look good. I was thinking of removing the top bar and replace it on the rock door. I when to the steel shop and they don't sell channel iron that size. this was 1 3/8 wide and and leg is 3/8 high. I can buy 1 1/2 by 1/2 but it has 90 degree angles on the inside. The one I took off is tapered on the inside. how serious a problem is this. Can I get a way with just running one bar short for this season to make sure the machine even works. If the machine works can I just replace all the bars with the larger channel as long as they are all the same size. Or will the lighter channel iron bend to easy? i attach some pictures of what I have.