Treeclimber,
Please carefully read all the posts in this thread before you accuse me of going tangential.
Stihl Intellicarb<sup><font size="-2">TM</font></sup> has nothing whatsoever to do with "fixed" jets. They are totally tangential features. None of the saws I've had with Intellicarb<sup><font size="-2">TM</font></sup> have had fixed jets. Others have very recently proclaimed the same or similar experience here.
It appears as though Stihl came out with the compensating feature in 1992, but I don't know if it was for operator convenience or for EPA concerns - both are likely candidates. Nevertheless, if an Intellicarb<sup><font size="-2">TM</font></sup>-equipped carburetor also has one or more fixed jets, it's coincidental. Perhaps the fixed jet is dependent upon the compensator, but the converse is certainly not true.
I'd like to use the word tangential one more time, but I don't want to be accused of babbling.
I can't help it if a discussion about a technical feature of a technical product is too technical for your taste, but I wish I somehow could. I also wish I could take back your post of 13:45 today for you so you wouldn't have to suffer embarrassment. Although I'm not always entirely successful, I do try to have a basis of some sort for the statements I make.
Glen