Yes, I was told that it is best to go with duct fans and not the blowers too, and I'm sure it works that way.
I just love to tinker, and think about things, like it would be a shame to have these powerful blowers go unused, but also understand that you cannot connect the blowers and duct fans to the coaltrol at the same time. So, I am just throwing around ideas.
Right now I have it set-up with the factory blowers and no ductwork or additional fans.
It would be possible to attach a duct to the inlet of the right side factory centrifugal blower.
The left one is not accessable because it is too close to the stovepipe (back vent model).
I suppose if I am sucking air from a room upstairs, or even the ceiling, it will be an improvement over my current lack of any ductwork. Going down this road leads me to thinking about a full setup with supply and return ductwork, or maybe just cold air return ductwork, and no supply ductwork, which is what you are kind of suggesting. With a full setup, it is recommended to put the fans on the warm side and use "duct fans"
I will let you know if I try it, but it will probably be a while, kind of busy with other things. This is all great fun, and the stove itself is amazing.