Pinned to my kitchen wall.

Good call, since it has no bark to begin with.

Mmmmmm crepe myrtle smoke is heavenly..... adds just the right flavor to the beef

That 165° for the first 5 hours was you're undoing.

210 degrees for 18-20hrs

Amazon

Update on the brisket. I wound up letting it sit on the smoker about another 45 minutes after my last post yesterday. Given the time constraints I had because of people coming over I could only let it rest for an hour. It turned out great actually. I'd rate it 10/10 on flavor, but 7/10 on tenderness. Tenderness was my primary concern. The short rest seemed to help a lot, but it still wasn't quite as fall apart as I like it. None-the-less it was a big hit with the guests.

Looks tasty!

Well, all's well that ends well - good job ! ! !

Looks really good. I like it tender but not fall apart tender, so it would be perfect.

Wait, you’re not an old? Talk about that bark. Explain please.

This is the mistake most folks make. You can't determine when a brisket is done by the internal temp. I've had briskets done at 192 IT and have taken them to 215 IT before they were tender. It depends a lot on the grade of brisket. The higher quality the grade the more consistent the finish times/temps will be. Once your brisket gets to 192-195 IT (unless you're cooking a wagyu) turn your thermometer off and just use the probe to determine when it's done from that point on. When it's done it should feel like sticking your thermometer probe into a jar of peanut butter. Practice this with a jar of cheap peanut butter until you get the feel of it.

As far as cooking times/temp there's many ways to cook a good brisket. If that time/temp is what works for you stick with it. But a 10 lb brisket typically takes me about 6 to 6.5 hours to cook. BBQ comp cookers rarely take longer than that to cook a brisket that size. They are excellent and almost fall apart tender in that time. But stick with what is working for you.

looks like it turned out nice

Tell me more about that spray bottle on the back counter. And you need to upgrade your knife game. Dexter 12" Scalloped Slicer.