I copied Tom Lipton's idea using 1x2 wood planks to create a wooden pallet type design. I have one for the mill and the lathe. The chips fall between the strips and there's a little spring to it. To clean, just pick it up and sweep the swarf away. Simple
You can see the matt in this vid at the 14.20 mark.
You can see the matt in this vid at the 14.20 mark.