Hardwood floor refinishing by trial and error

Using a small handheld belt sander to refinish a floor, gap filling with shims, getting it smooth and free of specs and bumps.
http://woodgears.ca/home/floor_refinish.html

I learned along the way and show some of my mistakes. Not everything I tried turned out to be a good idea. But the floor turned out good, just more work than it could have been.

For a while I had comments disabled. Over 1000 comments, but really it was mostly different version of the same two negative comments over and over "you should have rented a sander", and "you should have hired a professional". Both of which are already addressed at the end of the video.

You can see this floor again in my domino machine video:
https://youtu.be/N1-wU9NgsV4?t=5m37s

Видео Hardwood floor refinishing by trial and error канала Matthias Wandel