Quote Originally Posted by cestout View Post
Seems to me it would suck up a bunch of saw flour.
Set up right you don't suck up much dust.
In a typical vac hold down system you either plug the unused ports or some have a little valve that pops up unless there is a piece of wood on them, which prevent dust from entering your vac system.
There is a filter before the pump to catch any that does make it through though.

I really want to try this, but I haven't had time to design it yet say nothing of build one.