Yours is still an on/off controller without using algorithms at a specific settings so a PID will come out of full power below set temp as you see the light flash, cutting power on and off to the element as it comes in for a landing at set temp. I have my PID sensor down the top right side vent Gen 1 Mes 40 hanging 2"-3" off the right side wall on the second from the top rack of the four. It's my go to rack for meat. Bottom rack has a rectangle aluminum disposable baking sheet pan as a drip pan and the heat rises around the four sides of it. I also flipped the exposed element for more even heating and keeping drips off of it. The PID keeps the temp within a couple degrees where your food is vs a random spot on the back wall where your food usually isn't with the stock sensor. The heat around the element is the hottest and then rises so the bottom rack has radiant and ambient heat for a very hot rack I don't cook on so the drip pan goes there, then as heat rises ambient heat stacks at the top like a water heater as it works it's way out.and you can see the convection with the smoke cascading down the doors with windows around the food and back up. Top rack I use to manage therm cables, food in dishes I have two pit probes hanging from top rack on either side of the food 2-3" away. I have a probe laying on the top rack bur off the rack with a spring clothes pin between the middle of the rack and vent ( being the hottest ambient temp) with it set to a range alarm 145-290 for safety. So three pit therms on the left right of the food about the same temp especially after a few cycles the smoker goes though. These four total probes are unplugged and left in there position after each smoke. With multi rack smokes you can hang the probes between racks etc. With the PID I set it to get to temp quickly with a little five degree over shoot at 265-275 for brisket, ribs and butts but in two cycles it's holding within a few degrees and every cycle gets tighter till a couple degrees of the set temp. I use the mailbox mod with an Amazen pellet tray since it's a self sufficient smoke generator with consistent results every time. The element won't stay on long enough to burn chips when it hits set temp so you need a different smoke generator vs the stock.I think I understand better your recommendation for a PID controller.
With my new Amazon replacement knock off of MES digital controller. I placed a meat probe on the rack near the MES temp sensor, just above the water pan. I set the dig. controller temp at 200F. It went off at 220, on at 198F displayed. Temp on the meat rack ranged from 265F (off) to 224F (on). Vent temp outlet ranged from 185 to 160F.
I'm thinking the meat rack temp is the most important. What temp range control does PID typically offer by comparison? Thanks/dave_a