The last class to all have the Tweet started a month or so ago, there will be split T-6/T-37 classes well into next year, March or so. As for gouge, there's plenty of gouge, but it's all stuff they give you anyways, boldface and ops limits, so it's not exactly great stuff. You'll find once you get to the flightline, the "gouge" you wish you had won't be there, tests and such that the T-37 guys don't have to study for, you'll spend all your time on it. As for being old, the newest I believe is 1954 or so, but being as old as it is, it still out performs the T-34!