ya a shop vac is nice for the shop but buying new bags just cost a fortune. look into buying a dust deputy or build one. its easy; just use a sheet metal and form a cone, or just use a street cone my winter project is building a cyclone separator with clear plexi glass. I bought a kit from harbor freight, something similar to your link comp. but i actually just need the motor. paid with coupon about 150 for it. Item# 97869 I will keep you posted when I gonna start with the project.