Hi NickPol,
I have been making waxed canvas bags for quite some time I use a CB4500 with 277 thread. I also have a Consew 225 for the lighter work and mainly binding the inside of some of the bags. I had a Singer 7-34 I called Bob over at Toledo told him I wanted one machine to do leather & canvas work on he set me up with a very good machine. The CB4500 is a great all-round machine in my mind.