I have the exact model Juki, and sew everything from wallets & belts to chaps, chinks, and Dopp kits. I also go from waxed canvas to leather with minor adjustments. 92 thread is what I use most for wallets, but it is easy to go from 92-138 thread. As you know, you’ve got a great machine there. Get needles from Bob at Toledo ..... good luck!