These are the floating 3D printed parts for the V3 of the SCOUTcorexy concept, the one most likely to be physically built sometime soon.
Please check the thingiverse page for the SCOUTcorexy project @ http://www.thingiverse.com/thing:1487375
It misses the 3D parts that must be mirrored in the slicer before printing, namely the XY Motor-Mount and the XY Belt-Redirect_Bearings-Clamp. You will find those at thingiverse in the STLS attached.