Steve, I have never disassembled the CV Joints of the Porsche, however I have done it many times with the Fiat and Alfa Romeo half shafts and never had an issue.
The CV Joints have basically five components:
1) Inner part of the bearing (with the splines for the half shaft)
2) Steel balls
3) Outer part of the bearing (with the holes for the flange bolts)
4) Steel circlip (..?) that keeps the CV joint assembly on the shaft
5) Rubber boot
When you complete
disassemble and clean the CV joint, you will be able to inspect the races where the steel balls move, you will be able to easily see if the races on the inner and outer part of the CV joint are worn (or not smooth), IF one of them is worn most likely some of the balls are pitted as well.
I have mixed inner and outer sections (in good condition) without any issues.
As a matter of fact the times I had issues was caused by loose bolts (the ones that attach the CV Joint to the (hub or tranny) flanges, but that was my own fault..
PS: After removing the circlip from the shaft, you can remove the CV Joint and by rotating the inner section on it's axis allows you to separate the inner and outer sections of the bearing, just don't loose the balls...
