Every once in awhile, I post a crazy idea, just to get it out of my brain and let it haunt others’. So here’s my latest: what if you attached the router to an offset gearbox so the router body doesn’t have to be at the cutting location? Why, you ask? Because the axis of the bit is the center of the Maslow universe. We build complicated assemblies like the ring and the pantograph just to make the chains “think” they are connected to the sled at the bit axis.
Potential complications with this approach I can think of are keeping this assembly from torquing the sled, and possibly added complexity in the z-axis.
Potential benefits include moving the router lower on the sled, where I think it might serve as a weight, reducing the load of bricks needed.