I never sew over my pins, I think for the cost of any repairs, possible part of a sewing needle stuck somewhere on my face or body, it is not worth it. I do not want to damage my machine no matter how old or new it is. If I have seams to match up, I put pins in them and when I get close to it, I remove the pin and use a stiletto to guide it through under the presser foot. It has worked for me and if it works, don't fix it.