Here is the STL file, processed in the usual way, ready for printing.
I used Cura for the slicing, both for its support and ability to fix overlapping meshes (Project Miller has now ceased to function!)
I decided to print in black ABS and use vapour smoothing on the finished print. This version was printed inside the heated chamber at a slow 25 mm/s and 235C.
There is one small split across the back which I hope will improve with acetone treatment.
Before support removal
After support removal
I have another project in the pipeline (well, in the printer actually), so I'll wait until that's finished and then start a smoothing session on both of them.