I use YLI Longarm Professional on top, Bottom line in the bobbin, and also avoid quilting in the "rubber". No special needle consideration. I would question your choice of batting however. Thermor is really low loft. In my experience patchwork clothes turn out better with a lofty batting. Seems to help with the stretchy knit fabrics. Good luck. Jim
I have tried this and have the same experience with this which you have faced.
How to quilt a polyester T-shirt with rubberized logos?
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I have tried this and have the same experience with this which you have faced.