You could use a liner. Someone posted their solution to the suction problem, making a "cage" of 2 by 4 opening wire fence that sits inside the liner. The wire is close to 1/8th thick so it will resist the suction, but open enough so it's easy to remove from a liner with lots of sawdust inside.
This is not a problem with the HF type unit since it is a form of cyclone, but without a cone. If you look at the pictures, you see that the blower sucks in sawdust and spins it around a flat cyclone structure, so the sawdust falls out while mostly air goes out the filter, which takes out most of the ultra fine dust. The overhead filter (I bought the WEN on Amazon), gets nearly all of the rest if you run it an hour or two after you finish.
The real villain on dust production is the miter saw! My solution has helped greatly. I built a U shaped hanger of 1 inch rod and hung a clear shower curtain from it that surrounds the back of the saw and the table it sits on. The curtain is gathered at the bottom into a box, but I will soon re-do that so it gathers into a 6 inch to 4 inch adapter with a hose running to a fixture to which the DC system easily attaches. See photo. (sorry its rotated, have no idea how to correct that.)
I just received an over arm dust hood for the table saw. The Laguna Fusion saw is great at pulling sawdust down, especially with the new DC unit. But it still spits out some from the top of the blade. Raising the blade so most of the gullet is exposed has helped, as has switching to full kerf blades (for the most part). I haven't set the new unit up yet, but I will appreciate not having my shirts covered in sawdust every time I make a cut. I have to order a few items to make the overarm unit work and then work out how to attach it to the saw. I'll probably post something about it.
The bottom line for me is that I am no longer coughing up sawdust. And as I ongoingly clean out the corners of my shop, I notice far less sawdust being redeposited now. But I still wear at least a surgical style mask or a powered respirator when I'm working in there. Overkill? Nope, not to me, maybe it is really unde-kill, since I'm the one who wants to stick around another decade or two.
I have battled sawdust for a long time, and up to now, the sawdust has been winning.
The more I do, the less I accomplish.
Last edited by DesertRatTom; 01-17-2017 at 10:17 AM.