Well I finally finished the conversion of my X3. I'm down to the finishing touches. For the mechanics I used the CNC Fusion Deluxe kit with custom length screws for increased travel over the stock mill. For the electronics I used Gecko 203V drives powered by a Automation Technologies KL-4820 non-regulated power supply for the 48volt and a Meanwell 24 volt supply for field power. I used a Mesa 6i25+7i76 Plug-N-Go kit for the BOB. I also upgraded the spindle to a DMM Technologies DYN4 1.8kw servo as a spindle motor geared 1:1.8 for a top spindle speed of 5400. Everything in the control cabinet is running on 240 volts. For software LinuxCNC. I also built a counter balance based on what I had seen done on other peoples build. The control cabinet was a bit of work but I got a lot of help from other members on this and the LinuxCNC sites. I am very happy with how it turned out and surprised how well it works without going all the way to flood coolant. I'm just using air at this point and I usually cut aluminum using carbide three flute endmills at 5200 RPM. I use Fusion 360 for my CAD/CAM. I'm not doing production work just hobby use.
John