This is just the split fence. I just didn't want wood.
Just some computation.Thinking about dust extraction from the ends. You could push some clear plastic tubing into the square tubes and fill the open areas. Collect the tubes into a 4.5 inch connector or even a box with a connector on it. I think it would be quite efficient.
Don't forget to get a chip collector or dust separator in line between the tool and the shop vac. Here's a picture just in case. Without the chip collector, the shop vac filter will clog in minutes.Just some computation.
Applying the vac idea to the two lower sections of tubing, and using a 1" ID hose connected to each side..... that would be equal 1/2 the cubic inches or flow of my Sears shop vac hose. It's one of those "6.5 hp " wonders of the world 16 gallon shop vacs.
...anyway, those two small hoses on the fence would equate to 1/2 the flow, so that would require a smaller opening in the fence for the be rest of the dust collection...... More important for a smaller hole strength wise for the fence because it's 3/16" wall thickness. 1/4 might have been better... Oops, too late to go back.
I got that part under control Tom. I'm the crazy dude that made one with a turbo charger casting. I sanded a floor with a buffer recently and it worked pretty good. I brought it along just to test it out. Wood chips ought to be a piece of cake.Don't forget to get a chip collector or dust separator in line between the tool and the shop vac. Here's a picture just in case. Without the chip collector, the shop vac filter will clog in minutes.