It's been mentioned a bunch of times, Zama's website is loaded with info:http://www.zamacarb.com/prod_lookup.cfm
I'm pretty sure I read somewhere that Stihl bought Zama a while back.
" But let me tell you something ,folks: You can't fix stupid!
There's not a pill you can take, there's not a class you can go to. Stupid is forever!"
" Pay no attention to that man behind the curtain!