Kurt - that is a knife maker's tool !

as vintage centerpulls I go I think the Mafacs are the best. they are highly adjustable and thanks to Rene Herse cycles you can find parts.

The bronze bushings make a huge difference, as will the reinforcing plate. Rene Herse Brass Bushings for Centerpull Brakes – Rene Herse Cycles

The Weinmanns or Universals are just not very good brakes and I don't like the thought of using a 50 year old bridge wire. On the Racers you can use a derailleur cable for the cross wire and tune the length to suit the application.

/markp