I was triming some high holly bushes? approx 20 feet tall. I used a medal 16 ft. ladder and a stihl hedge trimer. I leaned the ladder against the bush and was able to trim it. It was dangerous. It wasn't worth the danger for a bush. What is the best way to trim these bushes? I thought about getting a Stihl pole hedge trimmer but I don't need it for the little I would use it. Tell me what you think.