Yardburner, just wanted to thank you for the great advice, Unfortunately I didn't see your post 'till all was done, but it will be helpfull in the future regardless.
I did two picnics in my WSM a while back and they seemed a bit tough. With this experience and your advice I now think they were undercooked instead of overcooked.
This is probably a whole new thread in itself ... but I guess it boils down to the physical check methods you mention in your post and a couple of things Jim keeps saying 'it's done when it's done' and 'use the therms as a guideline'.
I hate lifting the lid on my WSM, especially when the weather is bad. So I've come to rely heavily on the Maverick ET-73.
But it seems internal temps get wonky after 160F or so (at least with my ET-73, or how I position the meat probe). They will go up or down and I overcooked some chuck roll pieces trying to reach 200F. I'm now trying to learn what done looks and feels like.
So, when I have steady pit temps, maybe I'll try to use time more as a guideline than internal meat temp. Then, not be so reluctant to lift the WSM lid and twist that thang or just fork it!