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

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