thanks sw! i went with the bit that just made the rivets spin and went a little sideways to remove the rest of the rivet.this made my rivets stay tight going in. i was advised to use nuts and bolts but decided against it when i realized it was going to be tough to get to those top two holes!i was so eager to get the rivets in that i forgot to attach the window first!i eventually got it in the slider.do you think this will cause me pain down the line?