A larger 125mm base plate for Makita cordless and corded trim routers (RT0702C/DRT50/XTR01/RT001G/GTR01). This base plate has a couple of advantages over the stock circular base plate: it provides more stability as it's bigger, and it's perfectly circular so you don't need to worry about the orientation of the router when following a fence or edge.
Inspired by https://www.printables.com/model/30477-makita-rt0700-extended-circual-base, though this one has same hole and guide bushing inset as the stock base (I did reduce the clearance on the guide bushing slightly for a tight fit).
For the smoothest bottom surface print with the text up, but you'll need supports for the guide bushing inset.
If you print with the text down then supports are not necessary but you might want to enable ironing on the top surface to improve the smoothness.
The author hasn't provided the model origin yet.