Hey Steve,
I finally tried out the new brewery over the weekend and was very impressed with the mash recirculation temps.
I mashed in and overshot my target of 150F by about 8F. I set the PID temp to 150F, and started recirculating the mash through the herms. The HLT temp was up around 160F so I added cold water until the mash return temp was 150F....the HLT came on and off throughout the hour mash and the mash return temp didn't deviate from 150F at all...very nice!
at 45 minutes, I cranked the pid up to 168F, and within 15 minutes the return mash temp was readin 168F. I let it continue for another 10 minutes to bring the entire mash up to 168F, then sparged.
That was a very slick brew day I must say. Very impressed with the new setup. Most impressive is I didn't lift more than 5 pounds at once. That was when I was weighing grain.