Here is the process I used for doing the drywall. It does work and it seems to be well built. This is nothing that a bit of duct can't fix. The LED on it is a cree and it is VERY helpful. Way cheaper than buying a drywall vacuum.
Best Choice Products SKY1373 Features & Specs
Sturdy aluminum frame
Easy grip handle
Vacuum hose, attachments tubes, screwdriver and six (6) round sanding pad
Editor's Impressions Of The Best Choice Products SKY1373
Tool Motor Power
Drywall Sanding Ability
Value For Money
Best Choice Products SKY1373 Final Thoughts
"Good bang for the buck."
Just set the bag around your shoulder and sand away. The instructions will crack you up though. When finished the sander fits very easily back into the carrying bag. Did the whole job and only replaced the sandpaper once. The guys enjoyed using it on the walls.