They are pretty much foolproof in my opinion.
so you provide me with a opportunity to fool with something, I'm going to. So I proceeded to fool with the chuck roll.
It was larger than I needed and I wasn't planning an over-nighter (I had a day to cook it) so I hacked it into three pieces cutting it perpendicular to its long axis. To pieces were around 3 kg and the other piece that I intentionally cut smaller was freezered for later fooling.
The two pieces I planned to smoke we a bit raggedy so I tied them into tight roast. I then injected one roast with my first attempt at a home made FAB injection (salt/sugar brine, with added phosphates and flavor enhancers). I masses both roasts before hand and rubbed them down before heading to bed. The injected roast gained about 300 g with the injection and overnight marinade.
the roast in the bowl had been injected:
I got them on the wsm about 5:30 am:
Here they are after 7 hours of 250* cherry and oak:
They were still around 150*-160* internal but had developed a nice crusty bark, so I put each into a foil roasting pan and sealed them up tight. After another 5.5 hours of 250* they still were a tad stiff when probed however I had an offer to be on a boat on lake erie that I didn't want to refuse (it was sort of my idea anyways) so I chucked the chuck into a cooler and forgot about it for another 5 hours.
I was really pleased when I pulled it, the extra time in the cooler was exactly what they needed to finish breaking down. I masses both roasts again, I lost my record but I remember being surprised to note that there wasn't much difference between the roasts (which is similar to previous brining experiments of mine). However I felt there was a difference in texture between the two, and not much flavor difference between to the two. I felt the injected roast was much moister and the non-injected was dryer. I considered other variables (cooking, parts of roast, order in pulling) but I think I have enough evidence to proceed with another try.
The big complaints I read about FAB is the flavor and cost. I seems like most users end up cutting the product with juice or other things to try to mask it a bit. I was happy to note that the mix I used seemed to work, didn't add much in the way of a distinct over the top flavor, and was relatively easy and cheap to make.
After pulling it all I mixed both together and loaded back into the roasting pans and chilled them. I also chilled the drippings which I defatted in morning and split among the two pans. I served the beef two days later, reheated in the covered pan, on a small gas grill. It was served with carolina mustard sauce, memphis red sauce, and chipotle mayo. It sure was good and worth repeating.
thanks to everyone for the help and suggestions.