I'm finishing up the elevator skins and the plans call for CS4-4 blind rivets in the lower skins at the elevator tip in two places. The plans say to final drill 7/64" (which would be between a #30 and #40) which is a bit that I don't have. The trouble is that I'm sizing the rivets in a drill guide and they don't fit in a hole smaller than a #30. Should I just drill a #30 hole and call it a day?