Ok, let me get this straight, you filed you WSM with 40 lb of RO Chef Select and it only went 14 hrs and you got a lot of ash? 40 lbs of Briquettes make a lot of ash. 14 hrs on say 8-10 lb is about average on any pit. if that is the case IMO you got your moneys worth. I'm not a big proponent of designer bbq fuel. Lump is the way to go.
I never met a Cow that I didn't like with a little Salt & Pepper! Certified PORK-A-HOLIC