Making a downdraft sanding box

I'm guessing dust control goes under the heading of 'Shop Safety'...

Every time we sand anything at all we find that the dust is just too much to deal with and takes hours to clean the shop. So I decided a downdraft sanding box is needed. I've read how some say they don't work very well but I see plenty of how-to videos so someone must like them. Even if it only helped 25% it would be better but after building it and using it I can safely say it is catching at least 75% of the dust, if not more.

So nothing new or secret here, just a video documentation of how I built mine plus the slightly entertaining value of watching us work with a 4x8 sheet in a small shop.