I am having a heck of a time with skipped stitches. I am free-motioning with monofilament thread and poly in the bobbin, I have done everything I can think of and am STILL getting skipped stitches. Have you ever gotten an entire batch of bad needles? Is that possible? I bought some really inexpensive needles at Walmart, could that be the problem? I usually use Shmetz, I don't even know what brand these are. I just don't know what else it could be.