I'm going to try the clear vinyl used in strip curtains(instead of brushes) about 3-4 inches long. Cut 2-3" deep slits in vinyl about 1" apart at bottom. Mount the vinyl on piano hinge and then mount hinge on the main plate to hook up the vacuum. That way I can see what going on with the bit while running and also flip up the vinyl when changing bits or when not needed.
I'll post pics when I get it done.
Mike