About this 3D model

its a new implement for a z axis on a reprap or 3d printer it make more portable because increment the height when it turn some sense, its a new concept used on j-rev 3d printer with this printable part can reduce the space required to store a printer previous models has just been modified to mount with three screws to a base and turning on a leash, it is noteworthy that for its construction is necessary Ponar a stop at each screw so that in the end this will serve as another nut and continue to rise is the same design but I add a screw to raise up more http://www.youtube.com/watch?v=lwGNMg1tTzE