Chainsaw Repair

I had an FS-45 but never really liked it. Too noisy and too much vibration to suit me. My current Echo GT-200 is a treat to use.
The FS-55 and FS-90 use the flexible shaft. The 55 can be fitted with a weed blade as well as the 80 tooth brush blade although Stihl discourages the latter. The four mix FS-90 does not accept a blade, it is a commercial grass/weed trimmer.
I'm old school, don't like the four stroke hand helds at all. They have great torque but are heavier and too complex, anything internal fails it goes to the scrap pile. They are not economical to rebuild. I am going to keep my 2 strokes going as long as I can.

FS55 has a cable shaft but the FS90 has a steel shaft. The 90 thru 130 have the same shaft. As for blades all are recommended and used on the 55/56 and up by Stihl. Cable in 55/56 has a lifetime warranty.