I was carving up 20+ inch Tamarack and Eucalyptus trees. They where dropped over 5 years ago and mostly very dry (they came from california desert). That little power head had great usable power for its size. I have no problem rec. this unit to anyone! The chain is another story!! It is (for me) useless! I was at my father in-laws house and the bar was smoking (YES, I do know how to cut). He admitted to me he makes about 10 cuts on his old homelite then sharpens due to how dirty the wood is. Today, I tried to recut some big logs to split and the chain started to smoke, sooo I stepped over to some pine I had to cut and it went thru like a hot knife cutting butter. Can I use an older 142 bar with a .050 gauge so I can run a carbide tipped chain? "OO" and by the way does anyone make a carbide chain for the 142?