Yeah, washers are on there (for both hard drives).

I wasn't worried about the type of audio, but thought that there was an outside chance that a lot of deleting and writing might have had an adverse effect (though I don't see this as very likely).

In the car, it's almost flat, maybe a 10-15 degree angle.

No real temperature swings, and I don't leave it in the car, though I did notice problems with it on hot days.