I have my buffer and am getting my 3M products soon (compound and glaze) and can't wait to get started... I do have a question about my rails and rod holders on the top cap: I felt the underneath the rails and it feels like they are self tapping screws. I didn't feel any nuts or washers under there. If I take them off to do my work, will the snug up when I put them back on, or will they be loose now?