We recently moved and out new place is exactly what we wanted except I no longer have access to a flat slab of concrete to lift cars up with the floor jack. It dawned on me in all my years I've never lifted a vehicle on a gravel surface. It seems obvious to me not to do it for safety sake as I REALLY take that part of it serious. It's packed down hard but just figured I'd get confirmation on what I already kinda suspect is the answer. Thank you in advance for your assistance.