Inside the removable back cover, on the side where the take-up spool resides, there is a long chrome bar which I believe acts as a stand/holder for a pressure plate of sorts. Mine is simply the chrome bar with two visible holes. Can someone describe what should be there, or provide an image of theirs? I only ask because as the film builds up on the take-up spool it apparently gets scratches from the chrome bar inside the cover. Electrical tape should fix this problem, but a part appears to be missing. Thanks in advance.