I have a Brothers Innovis NX400Q that skips stitches. I have taken it to two different Brothers dealership but neither one of them believes me that the machine does that because when they plugged it in the machine would sew perfect. I even told them that the skipping doesn't start until after you have been stitching a bit. They gave me a yea sure look. It used to only does it during straight stitch but now it does it during free motion. After being burned twice it is hard to try again. Thankfully I have two other less fancy sewing machines to help me finish my projects until I have enough money to try another repair shop again.