TR6 carb idle trim screw

[Cregg Cowan <cowan@erg.sri.com>]

Unfortunately, my beloved TR6 failed the California Smog test yesterday.
It was close, but missed the CO% maximum by a small amount.

I assume this is adjusted by setting the trim screw on each carb (I still
have the controversial ZS175's....), but I'm unsure what to set it to.
Any advice from fellow California TR owners?  

Hopefully yours,
Cregg Cowan
71 TR6  CC63192L