‘Sirloin Tip’ or “Beef Knuckle’ - looks small but the knife blade is 18 cm or 7”. 4 kg or 9 lbs. Good price = $3.19 U.S. per lb, or $7.02 U.S. per kg. It is said to be the most tender of the ‘round’ cuts; we will see.
It’s like butchering a tenderloin - you need to scrape off some ‘silverskin’ and chase down connective tissue and cut it off/out. I ended up with 10 nice little steaks, visually indistinguishable from filet mignon - and yes, too lean just like that cut.
The rest I cubed, sauteed in hot olive oil, and added to a mighty pot of beef + vegetable soup/stew.
The steaks are in 4 separate bags in the sous vide cooker @57 °C or 134 °F. I’m not kidding myself, these aren’t going to rival filet mignon for tenderness, so I’m thinking try them first at 6 hours, then around 24.