Mismatched caliper pistons???

Haha, that is pessimistic. But you may be right. One day I aim to put an AlterK in it. Doubtful I'll put 30K miles on it before that. In the past 10 years I've only done 10K in it :)

Don't worry about it.
The car is never going to have another brake job done to it, in it's lifetime.