The first test was to empty the box under my table saw. I expected more sawdust in the can; this appears to be less than half the quantity removed. Note the pieces of blue masking tape.
Note orientation with respect to 1'' dowel. Temporary piece of white Formica in lid grove simulates side of trashcan. The objective is to find optimum location.
1/4'' Masonite Baffle per Phil Thien's design. Inner diameter (240 degrees) is 2-1/4'' less than outer diameter (120 degrees). Outer diameter is slightly less than diameter of trashcan.