How I Designed This
Quick change in Prusa Slcer
Used add 3 rectangles and 1 Negative rectangle.
Because of "slope" of holes I had to fill in old holes with 3 fills.
The author remixed this model.
Remixed to reduced the number of Rows for those that only do small Jewelry.
2 files 2 Row and 3 Row from the original 6 Row.