I agree with Scott
why would you want an expensive TM (and gas to run it) to do the job of a $100 shop vac?
not to mention all that saw dust in your waste tank?
even with a Dust Downer, it will be a thick slurry of saw dust muck.
regardless, Dust Downer is the only "attachment" I'm aware that you'll need.
If you're not familar with the DD, the best way to describe it is a short piece of vac hose with an internal jet to spray/wet down the dust.
Many floor sanding tools have the vac port to hook too.
so it's just a matter of connecting your vac hose, no??
..L.T.A.