pyramid puzzle

I created this puzzle and then found out there are several other versions of it already here on Thingiverse. However, I am still uploading it because I think it solves some issues that the other versions have: 1) trying to print a sphere is difficult (it never came out well for me at least); 2) I didn't want to have to glue pieces together.

By printing the top half of each set of balls and printing pegs that allow you to just press the pieces together, I accomplish both desired outcomes. However, it does require the time and material to print 30 pegs.

The balls are sized to be 25mm, but you can scale everything by 72% to make 18mm balls. It just depends on how large you want the puzzle to be (and how long you are willing to print).

Print 20 of the half-balls. I used 10% infill.
Print 30 of the pegs using 100% infill
Print 1 base, with 10% infill.