okay, so necessity is the mother of invention. how to make a 996/boxster cam timing tool for ten bucks:
1. find a socket that just BARELY fits into this hole. for me it was a 21mm.
2. find a wood bore drill bit that BARELY fits into the socket. for me, it was 15/16.
3. cut the end off the drill bit & cut the tip off the drill bit, leaving about 5mm protruding from the tip.
4. put the cut piece into the socket. voila, you have a 1/2" drive porsche cam rotation tool.
now time your cams. more to follow.