First, my bad, forgot the pics! Got busy entertaining my guest and dropped the ball.
But, to the steaks, nice cut of beef. Good marbling and grilled up nice. Similar to sirloin, but a tad more "beefy." One tidbit, cut on the bias across the grain. It is slightly more tender that way. I had a touch too much red wine vinegar in the marinade, but overall nice flavors. Will back off the vinegar and add more soy sauce next time (or maybe some gochujang). It was marinated overnight. Cooked as planned at 350F dome, 400F at lower grill, with red oak - 10 minutes total (flipped every 2 - 3 minutes). Came out a nice medium rare in the middle. If I read correctly, this is a single muscle cut from the interior of the chuck, so about 3/4" thick is a big as it gets. Just wish is was a tad thicker. Overall, I'll buy it again.