As much as I've paid for my Berninas (4 of them) I will not sew over a pin and take a chance at having to pay a big price to get it fixed. My cousin has Janome and she sews over pins all the time. She and I had a discussion about it and she said it hasn't hurt it so far. About a month later she suddenly had a problem with her machine. Guess what!!!! She took it to the dealer to have it worked on and she had messed up the timing. I'd rather us my money for my addiction....FABRIC.