I'm currently testing a new film plate, which reduces the direct contact to the film to only the side parts (which do not have parts of the images). In all the tests no film has ever been scratched, but I want to eliminate the risk. 

The new version brings another challenge: due to lesser friction, the film will not be positioned so tightly, so it can be moved more easily. (eg through the film capture wheel) 

V1: Scanning 15000 images showed that the frame has been corrected by the stepper about 500 times - peaking when glued parts of the film got scanned.