Ultracube

This is a very WIP thing. It's supposed to be a heavy duty version of the Hypercube Evolution with linear rails for X and Y, a very solid milled aluminum gantry... also, it's a H-BOT design, rather than a Corexy! I know, right? H-bot suffers from racking when moving along the x-axis! But on lower accelerations it's so small it's hard to even notice it. It will be possible later on to turn it into a CoreXY with some additional parts (i.e: idler holders and x-carriage) I'm yet to design. In that c