Jeff designed the Belt-Over-Wheel attachment originally for the 8″ Tradesman.  The main benefits being that you can change grits (from wheel to belts) without breaking setups, and also save the life of your CBN or diamond grinding wheel. We recently had a customer ask for this set up on the Tradesman Machinist.

Here the BOW attachment is shown on the Tradesman edge  10 inch wheel one end 8 inch other end

Notice the Tormek Bracket on the back of the machine leaving the two from workrests in place

We like this set-up for knife grinding and works great with the Tormek attachments on the belt or wheel.