I'm curious whether any of the experienced saw guys in there, or anyone else for that matter have run across one. Stihl is trying something new out on the MS 280 - electronic high end mixture adjustment. In place of the high speed needle, there is a little fuel solenoid wired in parallel to the kill circuit. In the ignition module, there is a little microprocessor which monitors how well the engine is running based on RPM. About 30 times a second, this solenoid opens and closes, thereby metering the fuel in the carb. The processor monitors how the engine responds to tests (temporarily cutting off the fuel for a tenth of a second) and adjusts the mixture accordingly. Supposedly, it can compensate for changes in altitude, temperature, barometric pressure, and even poor gas they say. It sounds great on paper but I would like to see how these units hold up over time. I ran the unit and cut some wood with it as a test. It started easily and seemed to run OK. The high end mixture sounded pretty good, close to where I set them (which is richer than out of the box). It seemed a little slow to return to idle, but not like an air leak. I will be really curious to see if these start coming in within a couple years with burned up pistons, and how well the modules and electrical bits stand up. Anyone ever see one?