This is a reducer to fit the parts of the Spindle Mount that will work with the Makita palm router. It should also work with other 65mm spindles.
Note: I've modified (and tested) the design and posted an update to this resource. The Download button will take you to Thingiverse, but I also attached all 3 STL files to a post in the Discussion tab.
Spindle Mount Adapter for Makita RT0701C Version 2 (9-5-2017
3D Printed 71mm to 65mm reducer for Makita router