Hi Larry,
Hope you review this post! A question occured to me whilst reading the previous post - I've noticed that my leak detector (a Robinair model no. 16600) doesn't seem to be able to detect R134 leaks. Have you noticed anything similar? For me, it's another good reason to stick with R12. The leak detector is very sensitive to R12 leaks.

Regards,
Richard Wooldridge
'82 300D/4.3L V6
Etc..