I cut the holes for the stop-turn-tail lamps and the backup lights. Instead of spending around $50 for some 3" and 4-1/2" hole saws (which I'd probably never use again), I decided to cut out the holes with my old Skil jigsaw.....until about 30 seconds into it, the plastic housing completely cracked open and it wouldn't cut straight anymore. So, I wound up spending $70 at Lowe's for a better quality Porter jigsaw. So much for trying to save a few bucks.