I am looking at buying a leather sewing machine. Mostly for belts, guitar straps, chaps, maybe a holster or sheath down the road. Three I am looking at are a singer 7-11, singer 331k105, and an Adler 37 -26. These are local machines that I can play with before i buy, but I was wondering if anyone could tell me the capabilities on them and any recommendations on them. Thanks
David