Originally Posted by
ClemY
If the chain is hitting the bottom mounting screws, look to see if the screws are a bit too long. If they are, it is an easy fix to file or grind them to size.
He said it was the heads that were in the way, but maybe he's screwing them through from the inside? If so, yeah, the solution is to have the heads on the outside and cut the threaded portion down to size.