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

Post-Printing

sand paper template

use the flower like template to cut your sandpaper
( and velcro if you are going that route with an exacto knife for best fit onto the ball.

you could either use cheap hot glue and glue directly onto the ball
( i say cheap because it is easier to peel off )

or

use velcro pads