I’ve built out the first two axis in my AR3. The procedure I used to set the bearing set screws has been to tighten each screw, one by one, till the bearing resists rotation. I then back off the screw a bit. I’m not really confident this is the correct approach so any suggestions would be appreciated.

Pretty much all of the limit switches listed on Amazon are the same poor quality switches. The roller cage is badly made so the j2 tension ring misses the wheel altogether in my build. I’ve ordered some Omron switches from Mouser in hopes that they will be better. Much more expensive but it seems a shame to build such a nice robot and have flakey limit switches.