On this week’s episode of the Better Rivals podcast, our free agency preview continues with an eye to the offensive side of the ball. What could the 49ers do at tackle if they don’t manage to keep Trent Williams in the building? Is Alex Mack worth the money at this stage of his career? And is Kyle Juszczyk so unique that the 49ers should pony up again to bring him back? All that, plus the barren guard market, a few names at WR and TE we find interesting, and French fries on cheeseburgers.