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-probe so will simplify the mount).26/07/2015: Added the components for the servo mount, servo arm and lifting arm to enable auto bed level compensation. It uses a SG-90 servo. 19/07/2015 update: Uploaded the more complex Chimera mount and the layer fan duct. 14/07/2015 update: electronics for auto bed level detection sorted -a mixture of opto (for level detection) and mechanical (for endstop safety). Now I can complete the Chimera carriage and duct. 07/07/2015 update: Final testing of the next piece continues. This is a Chimera specific mount with bed levelling and two layer fans. I hope to release this in the next few days. 28/06/2015 Original post: This original work was created to solve my need for a robust, stable, X-carriage mount for my Prusa i3 and e3D Chimera hot end. Design features include: I printed mine in PLA. Marked work in progress only because I'm adding the remaining components as I produce them. Parts posted are fully workable. This item was not based on any pre-existing work and was created in DesignSpark. Unfortunately the DesignSpark files are too large to upload - Thingiverse refuses to upload them as they are over 500k each, with some nearly 1M!Other parts designed for my Prusa i3 steel upgrade are:These are all listed on the Group page I have created for this project http://www.thingiverse.com/groups/prusa-i3-steel-upgrade-project Please feel free to add comments or suggestions there.For avoidance of doubt, this item is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. See http://creativecommons.org/licenses/by-nc-sa/4.0/ for more details.Slices using Slic3r, printed in 0.2mm layers with 50% infill and support using PLA. Requires a little 'dressing' after printing to clear holes, seat nuts (I use a soldering iron) etc.