Looks awesome. Now for the details por favor:
After the 3 hours smoking, at what temp did you pull the brisket off?
The 40 hours in the sous vide took it to what temp? My very rudimentary understanding is that the magic of sous vide is that meat can more or less be held "in stasis" once the target temp is reached, so that it's "waiting on you," and not the other way around? In other words, the 40 hrs in your case is just that ... your case, not actually how long it took to reach whatever temp? Hope that makes sense.
Apart from getting the bark set, what was the final pull temp form the Weber?