I made this jig for the Makita RT0702 with a 16 mm guide ring and a 10 mm bit.
It uses a dovetail connection so it can be adjusted for different door widths—just make sure to keep it centered.
On the front, there are two marker lines: these indicate where the recess ends and where the hole for the mechanism goes.

Sizes are from the NEMEF 1200 serie. A common size in the Netherlands.

I printed it in ASA but it warped a bit, it was still usable but something to keep in mind.

In the 3mf file I also added a test dovetail connection.