Modular Prusa X-carriage & e3D Chimera mount (layers fans, bed levelling, cable chain)

24/12/2015: I have now developed a new, simpler version of the fan mount and duct. Mine is printed and ready to mount and I will add updated files here once I have fitted and tested the parts.

27/10/2015: Uploaded a new duct (v3.00) I printed this in ABS and use 3mm magnets in the holes to mount it. I drilled the actual Chimera mount 2mm duct mount holes out to 3mm to add 3mm diameter x 4mm long magnets to that to retain the duct. A new Chimera mount will follow (I've stopped using the Z-prob