This is the version 1.5 of the 3d Printer Miracube V1.0 with corexy (http://www.thingiverse.com/thing:358878) with some important modification.
I positioned the Z-axis motor outside the structure, the only 3d piece changed is the 17_Z_Screw_Driver.stl, it must be replaced by the 40_Z_Screw_DriverV1.5.stl
You can see a new project on tinkercad here:
Entire set of x carriage for 1 hot end only
In this case you can print only 1 exstrusion set.
A video of the Miracube in action can be viewed here:
A Corexy 3D printer.
This thing was made with Tinkercad. Edit it online
From the above tinkercad link you can build simply the MiraCube. In the 3d tinkercad project you can compute all the measure of aluminium extrusion profile.
I used two type of brico aluminium extrusion profile
Yuo can rescale the entire printer on axis Y and Z. For the resacaling on the axe X You must reengineer the heatbed support mount.
For the X Y and Z sliders I used 8mm smooth rods (you can get the lenght from thinkercad project) and a LM8UU linear bearing.
For the kinematic motion I used 4mm inner hole ball bearing and a GT2 belt.