Looking to start cutting my own Ficus bushes.. They are pretty tall, around 6-7 feet i would say. I see the local landscaping guys using this big hedge trimmer that has some kind of debris gaurd on the single edge blade, (looks like a big letter F almost)and it just slices through like butter. Every trimmer I have seen does not seem to show this debris guard on it. Where can I get a trimmer like this? thanks!