To revive this thread.   We were out clearing trail this weekend which we do more than 750 hours per summer.  I only mention this to give folks and idea, how much these tools get used.  On this section, no one had touched in years and quite a mess, as seen in the photos.  Its about 1.5 mile hike in just to get started, so we can not bring every tool in the shed with us.  Weigh is a premium when you must hike in.  This day we brought with us 2 power units, two string heads and one saw head plus other accessories for this type of work.  The string heads hold pre-cut .155 strings.   What's not seen is all the overhead branches cut with a pole saw.   Hope that helps.