Vacuum duct

anybody know how to use vacuum duct ryans ones he sells. trying to figure out how to put a router on it. prefer pic. thanks

If you have the dewalt, it sits right on the shield, and the port lines up with the built-in port. https://docs.v1engineering.com/lowrider/#center-assembly

If you have another router you would just get it as close as you can and let the downward facing port do all the work.