Thanks PedroG! I'll definitely give that a try. The science of cooking and control systems have always been major interests for me. I'm probably going to give that a try over the weekend when I get some free time. I actually re-ran my autotune, and it seems to be holding with much more stability. The P value held constant, but the I and D about doubled compared to the waterproofed probe. In the meantime, here's my latest SV attempt. A pork tenderloin brined in a 6% salt solution, coated with Dijon, SV for 2.5 hrs at 60C and seared off. The pork was perfectly tender and juicy, but unfortunately I could barely taste the mustard after the sear, and while the brine salted it to my taste, not a lot of other flavor penetrated down into the meat. Any advice on how to treat this cut? From what I've been reading it seems like a lot of people have trouble bringing good flavor to pork tenderloin.