Long time lurker, first time poster. I just put in my order for my maslow kit and am looking to add the Z-Axis kit as well. I have a Craftsman router (this one: https://goo.gl/3iEs4u). It is very similar to the recommended Rigid router, so I am going to give it a try.
I’ve removed the adjusting knob exposing the shaft (picture below), but I’m not sure what size coupler to order. Measuring from flat side to flat side it is 1/4 inches, but curved side to curved side it is 5/16 inches. Anyone know what size I should order? I’m very new to this, so I appreciate any help.
Thanks so much!