Reply by DublinBoy

I’ve had my AR8Pro+ for four months now. The slots are fine on mine and accept both 5/16” and 8mm bolts.
The only issue I had was some inaccuracy in the y-axis movement. A call to Chad at Axiom support quickly resolved it…the cap screws on the y-axis ball screw were loose. I consider this a quality control failure, but they were extremely responsive.
Other than that, the unit has performed flawlessly and I have no reservations about recommending it.