Blank Universal tool mount for MPCNC 525 remix by Brink

I mixed in and printed wbarber69's in a tool mount I was working on before I realized that the shoulder on the insides of the holes were very thin. My tool was substantial and I feared that it would rip those thin shoulders right out of the back of the mount plate. I ended up using washers on mine that made the screws grab the front of the hole. I thought though that I would beef up the thickness of the shoulders since it was easy for me to do so and my help someone else who wished to use wbarbe