What software is used to adjust these carburetors and how do we as end users attain the software. Are we left at the mercy of the local dealer? I have some local dealers who know their stuff, I would trust a diesel mechanic with software before these old boys though.As I understand it, the non-strato saws often need to be tuned leaner than they should be, for EPA inspection reasons. Then it is up to the dealer and owner to correct the situation....