Anyways, I made some mental notes. If these help anyone, you're welcome.
Abbey-Farm: Abuse the inside curbing on approach. Whatever you do, don't let the car drift all the way out on exit. Position the car so you can turn for Farm the second you straighten out. I've held 110 mph once or twice but 107 is a good number.
Village: I like engine braking into Village and modulate the brake. One of the few spots where I may get too much rotation, believe it or not. Anything below 50 mph and that's too slow.
Loop: I go with partial brake and hope I can get good turn-in. This is where I really have to tell myself not to overlap the gas and brake. I believe that's why I struggled so much in 2013.
Brooklands: Trying to determine whether going a little easier on entry is better than charging in. Whatever the case, stay right on the racing line. Bit of a tightrope.
Luffield: One of the times understeer is actually a benefit. Do a double apex. Charge hard on the inside at high speed and let that GT-R wash up to the racing line. Be patient with the gas, though. When you do throttle up, it should be at 100% with 2nd gear. Rear will actually kick out a bit so you shouldn't need that much wheel.
Copse: Braking needs to be early and not quite full. Where the darker patch of track ends is roughly when you should start turn in. I say roughly because results are inconsistent. However, it's better than trying to wait until right before the 50 meter board. That's what I would rather do to clear the apex better but there's too little grip by then.
Maggots/Beckets/Chapel: Get Maggots wrong and the lap's toast. Push the fronts too hard and the lap's toast. Best laps I've had through here has been when I carried the speed through Maggots and I was deliberate through the other two corners while keeping the car moving. With my wobbly low-resistance wheel, it's a nightmare.
Stowe: In 2013, I had the number on this corner. Not so much here. The ideal method is aiming for a super late apex by staying on the outer edge but it's a lot harder with the GT-R. Try to stay just below full brake at the very start and slowly take back it off while turning.
Vale/Club: Brake straight right after the turn board. After that, try to carry the speed through the left and when going right, dump the throttle just enough for some rotation. Then be brave and don't lift all the way through the line.