I make shoulder holsters and while I have a chinese shoe patcher I don't use it for stitching because the bobin is too small and while they are tough machines it wont handle large thread consistantly. So I modified it and use it as a motorized harness awl. Punch all the holes and saddle stitch. Visualize stitching a 60 inch belt on both edges and using enough thread to never have to rethread he needles.