I plan on dong a Muffler Mod on my MS 261 as soon as the deflector I ordered comes in. I read somewhere in a recent post that this saw also responds well to an advance in the timing. How much should the timing be advanced? Is this a standard thing that needs done along with a MM or just on this saw. And also how would you conclude that this is something a saw could benefit from? Please excuse my ignorance on the subject.