A remix of Bench Block by entomophile.  It's basically identical.  I reverse engineered his .STEP file as a new Fusion 360 model, just to fix some minor geometry errors that were giving me print problems.

Fixing these errors allowed me to print the model with the V groove for barrel work on the bottom, so that it would print well without supports (the original didn't print well that way, because the supposedly-planar top surface areas were not quite planar.)

Printing Details

I printed in a Tough PLA, with triangle infill at 30% density. Triangle infill, with its continuous vertical walls, provides a great deal of strength at the top surface.

I found it necessary to print with a brim.  Otherwise, the small crescent-shaped section at one side tended to break loose mid-print.