This reminds me of the quote, slightly mis-quoted, that all I want is my land and that abuts(?) it!
Start where you are, as I did two years ago, and build on what is necessary to get great Q, and I think you will find that you don't need more gadgets, you already have the perfection! We need a way to measure IT of our meat, but if it works, no need to fix it. If the door bell is still ringing, they like your Q! Sit back, relax, enjoy the comps, and think about that next smoke! Cheers