Hi,
Maybe my build log will be of interest to you and especially the way I made the z platehttp://www.mycncuk.com/threads/6457-Sturdy-and-Fast-all-Steel-CNC-my-first-build?p=59627#post59627
I intended to do it from aluminum but instead did the z from steel plate. It's extremely strong extended and compact.
My advice- draw it but do it when you have in your hands the ball screw nut, as it happens they can send you a slightly different housing than at the listing. It happened 2 times to me. Same for the spindle bracket, as they cast it sometimes the holes are not where you expect to them to be. Chinatown ��