Hi, new member here and thankful for all of the useful information that I have found and used! I am looking for some GOOD brush and small tree blades for my brush cutter. The ones I have used from Stihl are quite frankly junk. About two or three 1" diameter trees and they need to be sharpened. I notice several on the internet but would appreciate some first hand user advice. My cuter has a 20mm arbor. Thanks! Ed