I completed the task with one failure (the first with BigBox) and some disfiguration due to snot drops but the final piece, shown here, was very good; note the layer 1 finish, which has been exemplary throughout all the prints. Some might say it's over-extrusion but the rest of the print, including the top layers are equally good and any extrusion changes were done beforehand; see my posts elsewhere on the forum. I'm still on the original Z bushes so this is not too bad. The last image shows the temporary assembly, which is all 3D printed apart from the cross pieces, the red focuser assembly and fixings. The sharp-eyed among you might see my super hotend cooling fan modification to address a finger poking issue!!! Ordered fans did not arrive before the weekend so a piece of flattened 3mm PLA and some superglue restored the balance. I should also point out that the grey stuff was produced on my old K8200 and will be remixed later.