Dale-this one of my favorite posts. The dreaded HOA finally convinced me I needed to trim the hedges in front of my house. Personally, I wanted to be completely hidden from the street, but they had different ideas. Before digging the manual shears out of the garage, i wondered if I could use a hedge trimmer for other things and stumbled across this thread in my Googlings.
I wound up buying an articulating hedge trimmer attachment for my 32CC string trimmer. Because of the articulation, the trimmer can be adjusted all the way up to perpendicular to the shaft, giving me a cutting angle parallel to the ground as I swing the trimmer side to side as one would with the regular string trimmer head. But, i am just over 6 feet tall and getting closer to the ground than calf height is a tad uncomfortable. Out where I am cutting, calf height is a manageable height. Blackberry, saplings, pokeweed, horsetail, bracken fern and anything else in the way is quickly fodder for compost or mulch. I even cut and windowed some sunn hemp I planted. I'll let it dry and see how that works as "hay"