A collection of V Slot / Open Build library parts in Design Spark Mechanical file format

I have started collecting together parts in the Design Spark Mechanical file format for something I want to design (a 3D printer) as I couldn't find any in the file format I wanted. The models are just a copy of the face of the Sketch up file with all the curve line segments redrawn as arc and circles (reducing the file size substantially) pulled out to a 10mm section. This will be very much a work in progress.

Update 03/01/15
Added the 80x20 Rail and corrected the naming for the previous