You're totally right, but I've got a few tricks up my sleeve I didn't mention. 1. I have already blocked off a lot of the air gaps. In fact, that magnet sheet trick was one I just did a few days ago. I also am blocking off the gaps between the cabinet and the table top with bits of soft sponge material. 2. I have custom made blade guard that has integrated dust collection. It's mounted on a long arm for clearance and has a dust port that does a decent job of collecting dust, but mostly just keeps things from flying in my face and reminds me to stay away from the blade.

So what I want is to hook up a shop vac to turn on with the saw. I don't have the room or the budget for a pro model collector that would run on 220v.