Pete,
This is a 3-year-old thread that re-surfaced this morning, I just skimmed through it before answering the question. To your point, for anyone doing this measurement, especially a Porsche shop, something adequate should be put together.
Grady, thanks, I like taking pictures
. The 9145 sleeve (#10 below) is an adaptor to VW521/4, for use with Porsche differentials. The entire backlash assembly (#10-13) is fairly expensive.
