Spin Brush sander

I saw this video https://www.youtube.com/watch?v=V6T0U9yEw0I a few years ago but didn't really have a use for it but now with 3d printing and using PLA I needed a small sander that wasn't too fast, normal sanders move so fast it just melts the plastic.
Enter the Spin Brush sander I used an old Spin Brush because that is what I had and I have a rounded back and forth sanding surface and a flat square sanding area in one toothbrush, the edges are extended out to get into the tight areas where the head of the brush just can't fit.
I included the Sketchup file in case you need to modify it as the toothbrush I used is almost eight years old, who knows if they have changed since then.
Here is a video of it working https://youtu.be/B9w12FLegwE