Gentlemen ( I use the term lightly!), Getting ready to buy a new Stihl 660 to cut some 4-6 ft trees for my small firewood business. Plan to do a home muffler mod or send out to MasterMind for a light mod as soon as I get it. What bar length do you all recommend- 25" or 36"? I really could use the extra length bar, but don't want a bogging saw. From what I have seen with my 028 & MS310- as long as its been muffler modded, extra bar length is not an issue. They will run as strong or stronger with the longer bars as the short ones after the mod. Opinions?... Thanks, Scott