This one. It does very well unless you have liquid in the bag - it tends to suck it into the unit. You can keep that from happening by manually stopping the vacuum when the liquid gets close to the inlet. Not as complete a vacuum job, but it has worked for us. So far we really like it.
They're beatin feet to necroposter's door as we speak!
Could ya? Would ya?
Maybe it's because there's a bomb between the 2nd & 3rd stages?
Huh? Didja think of that?