Hi Old Dog. When I was a Cowboy Dealer for Ace of Hearts (Good One Distributor), they held a pretty hard stance on only using lump charcoal. That really hurt my sales because lump is so unpredictable and you never know what you are going to get in the bag. Since Chris has taken over he says briquettes can be used. Yeah the ash production is gonna be high but the Good One can handle it.
Besides, I bought a 40 lb bag of mesquite lump earlier this year and there was about 6 big pcs and about 35 lbs of sift in the bag. Done with that crap.
Welcome from So-Cal and if you have any Good One questions just let me know.