The newer cat probe meters that have no numbers, they have little white ticks around the edge of the dial. Look for them. They appear to correspond with 500 degree increments when compared to a labeled meter. I recall BK saying that the labeled cat meters just caused trouble with owners obsessing about what temp their cat was running at instead of only worrying about whether it was active or not which is the important thing.
I have stalled my cat. Just this year. It is much easier to do when outdoor temps are higher and draft is weaker. You can't miss it, the glass will fully get coated, the smoke will become white and heavy, and stove temps plummet.
I'm playing the game of trying to get long burns, low output, AND cleanish glass. Tough to get all three until the weather cools some more. My solution is partial loads, 20 hour burns at a higher stat setting until I can use more heat. Going through way too much kindling.
I stalled my cat this morning, I set it where I usually do or where I was all year last year and with the warmer temps this morning is stalled. Until the real cold sets in I'm going to have to remember to put it up a notch.