Originally Posted by
ArchaicArcane
I'd also say that really for that sort of work, a vintage machine is not really appropriate. A 15 or 27 with the big hand wheel -might- do it for a bit but they're not made for that and it's very hard on the machines long term. What Miriam was saying more gently than I will is that you're doing industrial work - use an industrial.
Maybe the optimal compromise, a vintage industrial, they are still around and often only needs a good cleaning and oiling to run again. I know model 15 can stand up to all kinds of abuse, but it's made for sewing clothes and curtains, everything for the home. You have to be a bit nice to it