I’m putting up 5/8” 4×8 sheets of drywall on my garage ceiling. I am finding the 24” center on rafters not all exactly 24”. So when I am butting up sheets some barely are able to get a screw into the 2×4 on the edge of the sheet. I find it hard to cut a 3/4” slice off the edge of the drywall. What is the best way to deal with this?