Great idea! I had the same problem. And by the time the vac starts performing poorly, its too late!
Yeah. The hose, and in my case about 10' of 2" extension pipe up to the ceiling, was filled right up before just a few wisps of dust were falling on the table from the saw blade. Its a testament to how good the suction is though. The CT just kept on going as if the hose was part of the bag!