Chomp, Thanks for posting this thread. I replaced my rears last year with rebuilts and was not impressed with the quality.
So, yesterday I rebuilt the fronts with kits (ATE's). The job was a lot easier than expected. I did not see a need to split the calipers as I could get to everything relatively easy. There was some serious gunk collected on the bottom of the pistons and in the bottom of the bores. But, they cleaned up beautifully. Any longer and things would have been ugly.
I replaced all 4 rotors, the pads and did a bleed job. The car has never stopped that good! The fronts were obviously sticking and not working properly. It stops with authority now.
Thanks to everyone else for posting photo's, diagrams and posting other advice. Especially D911 for posting that "Piston orientation diagram". I marked one side as I took it apart. But, I forgot to mark the other side and had to come in and search to find it.
Regards, AJ