I can't speak from personal experience but everything I'm seeing on it says the barrel is 3-1/4" which won't fit the 71mm mount opening. And it's not likely you're going to find any 1/2" router that will fit the Openbuilds mount. If you really want to go with this router, you might check with @Chris Laidlaw to see what mount sizes he has to offer.
I had the same issue trying to find a mount for my makita 1.25 router. I figured that since my funds were extremely limited I needed to use materials that I had on hand and that included the actual sleeve body that the router comes with. My idea is in the prototype stage and seems to work really well. I just need to make a few adjustments and I will be ready to make the part out of .1875 aluminum plate. I have attached a couple pictures of what the part looks like and how it is attached to the sleeve and the sleeve to the z-axis v rail. I have added three additional pictures of the aluminum base that will also act as part of the mount. I had to modify the sleeve of the base just a little so that the router would be free to turn without binding. This idea work rather well and save me money that I do not have to spend. If you want a copy of the file please send me a message.
great build I have just bought the same router and am working on mounting it, I was wondering how long can you run this router before it overheats? thank you
The makita router seems to be a better router than the bosch colt router. I have not run my router in a long term production setting just yet but I have ran it continuously for more than 6 hours without issue.
If needed, I guess you could always fix a 12v fan on top of the router in-take, forcing cool airflow down. Can only help. Gray