Well, Rex, it's certainly not us Vacuum Rescuers that run these torture tests - we just get nice restorable vacuums from those who do and as you say think the bag has a rock crusher brush roll and some sort of matter vaporizor inside the bag. LOL
In preparation for a photo shoot of my G3 last night I emptied yet more sand, grit and nails from the fam chamber and emptor cavity - gosh, I thought I'd got it all out...was turning the fan by hand when it stuck on something again. on inspection I found a few nails and a bolt wedged into the casing, though thankfully nothing has pierced the housing.
