an ordinary Chinese trimmer of 2.5 horses will solve the problem....I've been using it for 14 seasons, it had minor mechanical problems, only the plastic is bad....I guess I changed 4 tanks, the plastic cracks, everything else is fine.. ..everything is in order!
This just seems unnecessarily dangerous. Wouldn't go near that thing without wearing chainsaw chaps. A commercial trimmer can do all this much safer. A brush blade (they suck, too), hedge trimmer, or pole saw for saplings.
Echo made a plastic trimmer head that had flat chains that worked great. You know what happened to them some crybaby had them recalled. Just because someone got hit by the chain breaking and hitting their legs. If you would change the chains to a say chainsaw chain it could cut through small trees.
I think that it would be correct for STIHL to give you one trimmer, so that yours can rest