tell your men when they are trimming to not keep it revved up to the max the whole time they are trimming. itll tear up faster. i told my guy when hes trimming to never keep it at a constant rpm. Always pump the trigger. Its hard to explain just in words though...but im sure yall know what im saying.
My set up:
-2007 Chevy 2500hd 8.1l 4x4
-7x18 enclosed trailer
-Grasshopper front mount 61", gravely 52"
-36" Gravely Walkbehind, 21" exmark push mower