Thanks Steel.
I'm in a position where I can pay big bucks for someone else to do the work, or do it myself with what I have. I was quoted $1900 for the three covers I needed for the boat. I'm doing it myself for about $250. Even if I threw out all of my machines when I was finished, I'd still be way ahead.
I downloaded a maintenance manual for the Pfaffs (230&332) and I'm talking to a repairman who urges me not to use them for heavy work. I admire the Stradivaro and don't want to wear it out, but if I do it owes me nothing. I'll buy another mid century machine for <$50 and carry on. Meanwhile I am searching for a good used walking foot commercial machine that will do all my canvas work. I'll keep my eyes open for a Thompson, or a Singer 111.
I looked at "Rex" Chinese machines on Amazon, reviews are all over.
I do love the intricate precision of these old machines, stuff like that fascinates me.