You are not the first, nor last to to that. I did it (but with a #2 pencil) on my 95 Road king while changing cams and tensioners. Not to mention when mice filled my Rinehart mufflers with deer corn from then feeder. No damage, except that it scared the sh-t out me when I cranked it up and sand blasted the garage wall with deer corn! 😜 🤣