Anti gravital pencil holder / organizer

Crazy pencil/crayons holder I've designed for kids. It should work for pencils with diameter between 5-10mm (whole has 12mm and 3 tips without flexing have diameter of 4.2mm).

It has 2 points where 3 pins are keeping grip on the pen on an angle, so you could place it firmly but take it out easily even if there are some indentations on the pen.

It could be used upside down and should hold your pens firmly (I need to put the disclaimer, I haven't tested it for an extensive period of time, so please test it carefully ;) )

youtube video presenting how it holds - 

I'd suggest to use PETG if you want to use different sizes in future, from my tests I'd say that PLA works fine, but it deforms over time and will not hold tight smaller sizes after using and leaving big pens inside. Round stand could be printed with whatever you'd like.

Grip needs to be printed in orientation as in STL file (so upside down) to avoid using support. 

There could be million ways how to fix the mounts to the stand. It could be preinted all at once but I liked the idea to print it separately with different colors. I've made the indentation with 0.3mm gap to fit mounts without a glue but soon figured out that kids are too harsh for the toy, so needed to glue it.

Please if you have any suggestions how to make it better let me know.