Stoker makes a adapter to use with the BBQ guru adapter or you can use a 1 1/4 inch copper coupler to connect it.
I use our BPS drum to cook a Tri tip . Running the first 5 hours at 200 and then increase to 225 until Tri tip was 205. All air came from a 10 CFM stoker fan. I only wish BP had these when I was retrofitting our drum
Jim, do you have any pics to help me visualize it better?