I have smoked & IPed several eye of rounds. Always great flavor, but so many were full of grizzle. Does sous vide soften the grizzle, or do you just have better beef up there. I usually buy choice angus.
I think you're thinking about Chuck Roast, because I have never had any Gristle in any Eye Rounds. Eye Rounds are very lean, but no gristle.
Some of Chuck Roasts are loaded with gristle, and SV for about 48 hours takes care of that.
And Thanks for the Like.
Bear