The cooling system is mounted onto the Z axis and all contained on it. Standard arrangement to the spindle but one side fed from the 12v pump which gets the coolant from the clear reservoir. the return side heads to the twin fan cooled radiator and the radiator feeds the coolant back into the reservoir via a bubble trap. a couple of chunks of styrofoam give a visual that the coolant is moving as it should. The radiator and fans are mounted on the back of the Z axis, making it a very compact solution. total length of the pipe work is less than 4 feet.

Other bits about the Z, the trucks are mounted top and bottom, side by side, giving maximum load carrying in each direction that the forces will be applied. Ballnut is through the centre and in-between the line of the trucks.