Nice videos, on the y-axis did you get enough movement as at the maximum rearwards movement puts the front edge of the y-axis past the machine front edge(if you see waht I mean). On mine I have extended the y-axis with an ally plate which covers the ways when the y-axis is in the rearmost position therebye giving the maximum movement.
I reckon that if I raise the z-axis column I will be able to get a plate on the rear of the y-axis to cover the ways at the column end but it will not leave much metal at the fixing area, so still in the design stage!

Peter