My sanders have the dust extraction port but the dust extraction is very poor.
I made this very small modification that improved the dust extraction to a level that I have dust free sanding.
PS you don't have to start smoking
I made small improvement to the ROS that gives me “zero dust” sanding.
You can use any other flexible material instead of the Weather tape (that's what I had at the moment) to clear the orbit.
I found the Iron-on tape to be much better than the cardboard that I used on the square sanders.