I am going to try to post a picture of a property that I am working on. It has a row of Leland cypress trees planted about 20 inches from the edge of the driveway. The trees are now 25 feet or taller. The branches are over the driveway by about 3 feet. The owner wants to trim them back but not so much that it shows all of the trunk, etc. Can I trim this with a hedge trimmer or is there a better system? He wants to carve out about 8 feet high by about 1.5 feet into the trees to kind of make a tunnel effect. Any advice would be appreciated.