Ben you need to be more careful with your CV's as they don't need a hammer and flat punch. Geometry is both your friend and enemy. When I was rebuilding mine I found out how quickly they come apart and than how quickly they seem to "lock" up. Patients will be your friend, hammering force will come back to haunt you.
Take some time and look through here:
DIY Projects: Do-it-Yourself Repair and Maintenance for your Porsche
Replace the CVJ Boots & Half Axles
...and don't forget Mike's pages....
https://sites.google.com/site/mikefocke2/mikesporscheboxsterwebpages