Jim thanks for your input as you say every little bit helps that was my main thought if the thien collector works as well as so many have reported THEN perhaps a dust deputy AFTER it prior to my shop vac MIGHT. diminish the fines left floating in the shop atmosphere---if the shop vac can handle it--franly I don't see why not (mind you I think I remember being wrong ONCE before) anyway time to start my mark I experiment-cheers Gordo