[Overdrive]

You may find some folks on the forum recommending against using a lightweight flywheel. If you're getting vibration around 3500rpms it's pretty likely to be your motor mount, definitely fixable and not the most expensive thing in the world.

The way I see it, driving the car the way it was meant to be driven isn't going to end the car's life any sooner than trying to be nice to it in hopes that it will overcome a possible IMS failure. I'm just making sure I get my money's worth out of this great car.