When I have the M-Sport or my truck on the ramps I'm using 2 pairs or ramps so that the whole vehicle is up off the ground. Obviously that requires use of a floor jack to do that (and on the M-Sport I have to use the jack on both ends of the car as it's too low to drive on a pair of ramps). But I don't use the floor jack for additional support once either vehicle is up on the ramps. Have never come close to having any problems with such a setup.