A couple of years ago I went through my table saw and plugged the gaps where the base met the top, put a magnetic sheet over the blade tilt slot, put in a sloping floor, drilled 3 more holes in the access door. Last June I had to take the saw apart to fix an arbor problem, and could not believe the amount of accumulated sawdust! Without a monster DC I think it is a waste of time.
I have a DC that I can hook up to the table saw. I thought sealing it up would increase flow at the throat plate. Right now, it draws air from all the holes. Seems like it needs to be sealed up to just draw air (and sawdust) from where the cutting happens.
you actually want a lot of those vent holes...
Why? Seems like the opening where the blade angle adjuster is (it's harder to seal up, so I thought I'd leave it) would let in enough air.