I have and do sometimes. I also make them but haven't put the A-arms up online yet. They're good for thicket, rocks and brush. Keeps the arms from getting all scrapped up. But they're not good when mud is involved or open terrain as they aren't offering much for protection then and just act as huge scoops for holding mud. So if you run in the mud or open areas like a lot of fields, I'd save your money. But if you run through a lot of thickets or rocks, may not hurt to try them out.