I haven't had any trouble with no trip springs, but that doesn't mean I won't /w3tcompact/icons/laugh.gif I always wear my seat belt, just in case. Even a small section of frost heaved pavement can stop the tractor in its tracks. My PT425 is a relatively light weight tractor. When plowing with the blade angled, if I hit an immovable object, it deflects the tractor. I never plow 'at speed' with the blade set straight forward. If I had a larger tractor, I would definately want trip springs. I've plowed with a pickup truck plow many times. It seems like that would be great on the front of a set of FEL arms.