My reply would be my mom sewed over pins all the time and spent at least $150.00 and more a year for machine repairs. I never sew over pins and have not had to have a machine repaired only cleaned. I also sewed a lot more than she did. You want to pay for machine repairs which are much more costly now, go ahead sew over those pins your service technician will appreciate your business. Me I can't afford those repairs and can not stand to be with out a machine, so I take care of what I have.