@"Cant Get Right" Would love to see the 18 minute LR section by @"Jonathan Wang" you mention. Can one of you provide a link, please? Appreciate this discussion!
To echo what everyone else is saying: above all else they're useful for getting in the early repetitions on questions. Once you work your way to the most recent PTs you're aiming to refine mastery on the skills you've built during those early tests.
I do that all the time @"Jonathan Wang" . I’m actually deliberately balancing my carb/protein intake now based on a passage from the other day. It may just be placebo, but I don’t seem to feel so crappy all the time now.