Hi Pippin,

Thanks for the link I will have a good look there.

Initial reading suggests to me the recommended 1000CFM is based on a free space calculation, like maybe a hood over a sanding station. If the tool area is tightly enclosed by a shoe with brush that touches the work piece, then the story will be very different. Air speed inside the confided area will increase significantly.

I will consider putting a chamber around the entire machine.