Good spot +Greg Rebholz
i got all the hardware motors and bearings from a zen 7x7 i did do a few modifications integrating the skate bearings into the actual part opposite the motors. The Zen has a good design but i needed to upgrade it. I am going to use it to teach new machinist at work. (It was a fun upgrade if you have the time and the bonus is it can cut 6061 aluminium like butter).