3880 Head strikes at end of print

When printing 11 by 17 DNs this week, but also previously with 8x10, I often get head strickes on the right side of the negative towards the end of the print. At best this can leave horizontal thin unprinted lines, at worst it deposits ink and chews up the edge of the film. I do have about 3 inches of paper taped to the end of the negative to help with feed.

Ideas for solutions please?

Also, I’m feeding from the top at the rear of the printer - how do I feed from the sheet feed (can I do that for DNs?). I often get paper misdeed errors when the paper is fed in there.