well i purchased the srm-225 since it was on sale along side a 3lb spool of echo crossfire and a couple bottles of red armor oil mixed with 2.5 gallons of 90 octane E0 at the pump.
im amazed at how much power it has with only 21 cc and how it sips fuel and the trimmer head is awesome a lot better than my cumbersome husky. and when it runs it has a nice throaty sound
i should have bought one 4 yrs ago.