My make at 18x18x4. I used paulpenny's nema 23 motor mounts and then made a block that lets me mount the Nema 23 BLDC Servo Motors on the outside for clearance and weight distribution. System is Controlled by a Omron / Delta Tau PowerBrick LV motion controller. Closed loop control on X & Y and standard stepper for the Z axis. Enough torque to flip the whole table if you try to hold the tool center on a homing move. Currently accurate to +/- .50mm but am reprinting XY Burly to tighter tolerance before mounting spindle. This is a really fun project and i'm patiently looking forward to making some chips. Thanks to everyone involved.