So, wish me luck. I am building a "small" OX, but using a C-Beam on the Z axis. I purchased one of those inexpensive 400 watt spindles. The mount that came with it is just a bit too wide for the C-Beam gantry. I am going to try to cut a new gantry on my "big" CNC router. However, I am not sure it is accurate enough to cut a usable part, plus, this is my first try at cutting aluminum. If it works, I will post the SketchUp and DXF files.