I think I am getting closer to my ideal set-up. Brewed this past weekend and hit 84% with no issues at all. Hit the OG dead on. I was able to maintain my set point on my mash almost exactly the whole mash
Green button on top advances BCS to next state. Red buttons on the sides interrupt the heating elements in case pumps lose prime.
Both keggles are set up with bottom drains.
I'll take a few more so you can see the heat exchangers, pumps and rolling cart.