Printed using the UP! printer, there are 2 files uploaded, one with a 1mm wall thickness and the other with a 2mm wall thickness, I am using the 1mm one that seems a little fragile, so I created the 2mm one, I have not printed the 2mm one yet. The top surface is 3mm thicker to allow removal from the raft, it is recommended to print it up-side-down as less support is required, the UP! printer software does its own support, so none is modelled. I used the default settings for the UP!.

STL and STEP files are available for download.