I decided a while ago to go with one of these all in one systems, it is in addition to, (sort of) my two vessel recirculation system. I have an old keg that I have tig welded ports for an electric element with tri clamp, sight glass, thermo well, and two ports for ball valves, in the mash tun which I am using a 10 gallon tall boy kettle from NB I welded in a ball valve port, thermo well, and port just below the top rim for my auto sparge. I used the tall boy for quite a few brews before concluding that I wanted an all in one system and all I needed to do was get a false bottom and tig in a 2" triclamp port and I was set to have a "back-up" BIAB set-up in case I was working with limited time, of course in the BIAB back-up brewery I would only 5 gallons instead of the 10 that usually do but its compact, easy and I can knock out a batch in a few hours.
