Old Coach Saddlery Report post Posted August 1, 2015 My boss has a Pfaff 545 sewing machine that she uses for horse blanket repairs and leather chap repairs. The machine stitches great. The only time she has problems is when she stitches english half chaps with elastic stretch panels. The bobbins bunches and jams when stitching thru the leather and elastic. Its fine thru straight leather. Any ideas? Her old Singer never had this issue. Could it be the needle? Quote Share this post Link to post Share on other sites