Lakeside53
Stihl Wrenching
Did a google on tri-blade and am not sure what that is. I know they make heads with trimmers other than string but I've not tried one.
Would like to try something else though. a few times an hour I have to pull the head off and deal with getting the string to feed again. (From constantly catching on bushes and brush.)
I also have a blade, but I want to try something between a solid blade and string.
Sometimes I put a long bar on one of my small saws and clear brush with that, but I have to be careful not to damage trees in the overgrown brush that I want to keep.
Blackberry and woody scrub is not for string.
Softer woody stems (1 year blackberry) can be cut with poly-cut blades.
Tough stuff requires either the 4 or 3 wing metal blades. The small tooth blades are worthless in blackberry.