Thanks, great links.
I found the Rennline inserts for a better price:
https://www.****************************************/2003-porsche-boxster-suspension-systems/rennline-sealed-monoball-cartridge-set-991839531.html
If I go with the RSS Ends I can sell my OEM ends for 100USD/Each, should end up in the same price as the Ronnline inserts, but less work. (Exept for the Selling part)
It seems the adress in my link gets "censored" by default, why is this?