Amazingly 2-way power drive DIY disc sander

I have improved the disc sander I made earlier so that it can be powered by a Makita battery.
Of course, it is possible to replace it with a general-purpose motor simply by replacing the pulley.
It is possible to sand more powerfully.

Click here for the plan
https://jisaku-koubou.com/downloads/12discsander

This video is an update of a work I made in the past.
Here is the original video.

https://youtu.be/96pgHe2NQ4I
https://youtu.be/MNC4SUCrYFs
https://youtu.be/K_Kmpjtk2E8
https://youtu.be/f9oDaPHsvNA