Moving Desk And Y-Axis

The main goal for the moving deck is to obtain a lighter and longer Y-axis.

To do so, there's only one motor to power the Y-axis and the former X-axis motor has gone. I also used 250mm long metal axis and avoid any plastic axis, including for the moving axis.

The Z-axis remains unchanged. 

Result: a 14 instead of 9 units long Y-axis, or a +50% gain!