Originally designed by Wes, AF0AJ; this design is a modified version that blends a few of the corners a bit more and makes it fit a bit looser. I'm guess, but I suspect the base will be have a wider tolerance so I've included a link to the OnShape CAD model at Version 1.

Like all 3d printed models play around with the layers and finishing to suit. The images shows a print using draft settings so the radii can be improved in the print or through post printing clean up