Two of the goals I set when designing when designing the tool rest where specifically related to adjust-ability. First and for most, I wanted to be able to adjust the rest quickly. spending 15 minutes to set a tool up so you can use it for 2 minutes is always a buzz kill. Secondly, I wanted to have as much adjustability as possible. After pondering it for a while, I came up with the slot nut idea. It gives me 1-5/8″ of front to back adjustment, and it can be adjusted one handed.
The following video shows machining the slot nuts. While they look simple they could be difficult to make if you don’t use the proper order of operations.