Great vid. Looks like nice quick rapids too!
I seem to be plodding along on mine lately its been too bloody hot in the workshop, its hard to think straight when you've got sweat pouring into your eye's.
I opted to do the quill only (round column is out of the question anyway) for the Z thats 130mm of travel which for me I think is enough for what I want.
As you can see I chose steppers for the motors (nothing against sevro's just simplicity at this stage) and geared the X & Y down by 3.33:1 and the Z by 2.67:1. No play in the Z as I have re-tensioned the spring return so that it is always working against the motor, still with very little effort on the motor.
I have powered the column (not shown) with a ol' radar head rotating motor because the novelty of hand winding the head up and down wore off very quick, I think it was the day after I purchased the mill
You might see in one of the pics with the E-stop button a silver flush mount button 1 above and 1 below the E-stop thats the powered head up/down buttons.
Anyway off to do some more tinkering.
Adam.