I thought it would be nice to be able to use my mastergrip rotary tool with my quick disconnect https://www.thingiverse.com/thing:2131782 . Since it was a smaller diameter than my Bosch router, seemed like it would be easy to make an insert for it. After getting it to fit nicely, I went back & rewrote the openscad code to make it customizable. You can use this with the thingiverse customizer or use the openscad source on your machine. With 11 adjustable variables you should be able to fine tune it to way you want. This was designed to use with the Bosch Quick Disconnect design, but you should be able to use it with most any tool holder. I can add a dimensioned image file if variables are not clear.