Dremel Ball sanding bit

DIY Ball Sander for sanding concave items.

This is for my Dremel
I found a design i could work with and edited it with Tinkercad. ( I dont have the link of the original Design of the main shaft holder, if you think this is your design, let me know, I will add that information here )

I used the sandpaper on ball template from http://www.davidreedsmith.com/articles/foamballsander/foamballsander.htm

edited it in Paint.net to my liking
uploaded it to selva3d.com to convert it to STL

required
Dremel
1x m3x20mm bolt
2x m3 nut
KrazyGlue
Velcro pads

I printed this in PETG

things to note:
I could have made the hole for the bolt a bit bigger as it is quite a tight fit ( had to screw it through)
I could have given the ball more depth (Z axis height)

The flower is incorrect in size, will need to enlarge