The dust-collection system is unique and probably the best part of the tool. The R3400 routes dust through a rear-mounted fan and out an adjustable port. The fan is powerful enough to drive dust through the 8-ft. hose and into a collection system, a 5-gal. pail and a filter cap that come with the saw. I didn’t get scientific with it, but the setup seems to capture 95% of the dust.
They won’t keep me from using it, but the saw has a couple of annoying aspects. First, the front handle can get in the way when clamping down the lever. The fan housing and rotating discharge port also leak a bit of dust. I sealed the leak with housewrap tape—not pretty, but effective. It also would be nice if the port could be turned an extra 15° to the rear to manage the hose direction better. Still, this saw is a keeper.