I wanted to build the Dremel CNC but didn't want to go out and buy another Dremel so I found another mount for a Dremel 395 and mixed the two objects into one.
You should print this with 100% infill due to the stresses on the hinges considering the lateral forces applied to the tool when in use. They are just too thin to have any hollow spots.
No supports are required because I've added a single block that does the job in the threaded rod area. With a medium to High rez layer (.1 - .2mm) it will print all angles fine without support. Depending on your printer, you may need to add supports for the clamp areas if you are using low rez printing layers (.3mm)