This is a UMO version of the E3D-v6 on Ultimaker 2 mounting kit (1). The objective was to make it as small as possible to avoid loosing printing space. With the end-stops properly adjusted the print area is 205x205mm (rear right clip of the heated bed is in the way though) The fan holder is simplistic, but allows you to mount the stock UMO fan (with the Printable 'spare' Ultimaker fan holder(2) on the pictures). If you are using Chopmeister's TwisterBlocks (3), I provide replacement for the front and left blocks to compensate for the X/Y axis offset, so you don't have to tweak the limit switches. (1): http://wiki.e3d-online.com/wiki/E3D-v6onUltimaker_2 (2): http://www.thingiverse.com/thing:17602 (3): https://www.youmagine.com/designs/twisterblocks