I have a very basic, Kenmore sewing machine. The fabric was only too thick for my machine on the very ends of the final seams where my cord was coming out. So I stitched as close as I could w the machine, then put in a few stitches by hand where the tension would be greatest. Like I said, I really don't know anything about sewing machines. There is probably some way to get through thicker stuff. Check the "Thread Injector" threads for more info from the experts that are on here! I know just enough to get by
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