James, Automarc is correct. I would just stick the shop vac over the hole but the dust is so fine that you will need to keep the shop vac cleaned good so it can pull the air out quick. I have a SkatBlast cabinet with vac hooked to it and without the vac you could not see...especially after the glass/sand gets a little fine.
As a foot note be sure your vac motor has some kind of filter (sponge etc) to keep the dust from getting to the motor. The fine dust WILL get to any bearings.


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