I too have a belt driven Southbend of 5″ capacity, from 1947.
With 6″ chucks and 5C collets it is very versatile, and quiet in operation.
Accessories and spares still frequently turn up on Ebay at reasonable prices. Mine is running off a single phase 240v motor so I can only manage 1/8″ cuts …….
Do not get too paramoid about bed wear as there is bound to be some, its more important to spend time setting the bed up carefully so that it cuts parallel.
1929 2 speed Sports.