As I remember correctly the E-brake parts from Kerscher are for the steel arms and not for the alloy arms. I know this because I've done this conversion myself. The easyest way to go is to purchase a e-brake kit from MBT in Germany. This kit is easy because you use the original VW e-brake cable, no cutting etc needed!! MBT also hase a special alloy sleeve for correcting the length of the VW cable to the Porsche e-brake parts. Good luck.
