You mean that thing that looks like a bottle cap? file the valleys or the high parts?
Yes, file all the high spots even on the edge where the arrow points.
I don't know if a parts store is going to have that clip or not but a junk yard is your friend in this situation. If you don't have a junk yard close enough I could always go grab you a couple and send them to you (might even have some in the toolbox, but doubtful since I run a D60 and they are different).




This is EXACTLY what I said in an earlier reply.