Dave,
I am going to do the test that you describe today, so you will know tomorrow.
The BIG advantage of a seperate system is, that you create much less heat, with you everything is IN your smoker, including all the heat, with me. I only force smoke in it that is coolled by my ( now bigger ) condenser. The air that goes into my smoker is only 43F ( before the condenser it is 138F ). And once the CSG is smoking, I NEVER have to open anything, not the smoker, not the smoke generator.
My test yesterday lasted 6 hours, not bad. but I think I can do the same with only one hole in the center, but this time lit from the top, this is indeed much easier to make.
Here you see a pic before and after
I will keep you updated.
Hoggy