Has anyone any experience with these products and this company? Do they work like they say and do they stand behind their product? I need something for around the split rail fence and around trees in the yard (its a 5 acre yard) the wife drives the tractor with a disc for the big stuff NOT THE YARD and cant get close without crashing the tractor or riping the disc off. My 2stroke weed eater is not going to last long doing it with it, its not made for that size job. thanks for any help. They are DR products