Here's another answer
If your bobbin is spinning faster than you can stitch, remove the check (backlash) spring from the bobbin and pry the two fingers out a bit. Reinsert and do some stitching off-quilt to see if that helps. Bending the fingers out will prevent bird's-nests and breakage by stopping the bobbin when you stop stitching. You'll need to adjust your bobbin tension after this fix as it will be tighter.