I can't speak to any potential issues with "new" ones because the Turbo II I bought in 2004 is still running well, and pulls dust whether I'm using it as a shop vac, connected to my sanders, or connected to my 10 inch Inca band saw. I wouldn't connect it to any power tools larger than that, because they make these things called "dust collectors" that are meant to be connected to table saws, planers, jointers, and things of that ilk. I also don't use my chisels as screwdrivers, my screwdrivers as pry bars, or my wrenches as hammers. Your mileage may vary.