So, what’s the trick to get the cover off the vac?
After removing the screws going into the cover through the red part, and removing the handle above and even undoing the screws that hold the safety catch, the cover still doesn’t want to come off (still sticking near the hinge).
Nevermind—found the last screw down low, centrally located, near the hinge!
It’s a little scary in there with the thumpers. They are just loose and ready to pop out.