Modified the CAD files after about 4 iterations, the latest ones are available on the dropbox link for this project.

changed to printhead to 0.2mm and printed it in 0.05mm layer height in PLA.

Got an error of 0.01mm-0.02mm which is pretty kickass for FDM. Ive never had the need to push my machine ( a Fracktal Works Julia +) to this limit! the holes and pins required very less post process, to remove slight stringing which was expected.

The cam followers are separated into a different part to make printing on FDM simpler.