I increased the size to better fit a 5/8" (15.5mm) diameter dowel. Scaling the original file didn't work well. The hole was too small in proportion to the rest of the model. So I scaled the model appropriately for the 36" dowel my daughter was using as a plague doctor staff for school. I remade the hole to accommodate the dowel. It is a tight fit, especially after adding paint. A small bit of E6000 glue and it is a rather permanent fixture.
Major kudos to Kryptaos for the excellent design.
Print using supports. I used 3 walls for added strength. We added paint to get the desired golden look.