Spherical flexure pen holder

Another spherical flexure, this one as a pen holder. The hole diameter is 10mm, there is an STL and a STEP without hole so you can customize it.
The pen is not a perfect cylinder, there is a lot of play so the effect on the tip is not as good as the previous design.
There is a photo of what I consider to be the best position to print this. Be generous with the infill (>50%) so It has enough weight on the base to support the pen