If you are tired of spending all that time filing and filing and filing the stop in the top of your 206 carb to get the slide opening to the maximum here's a easier and quicker way to do it.                              Just take the top of the carb off, the gasket, the rubber boot and the brass fitting. Install the shaft of the tool through the threaded hole in the cap from the bottom and the put the shaft of the tool in your electric drill.   Turn the cap upside down and while holding the trigger on the drill pull up on the cap. the chips will fly so be careful you don't take too much off.