Yes, as a tip of the hat to the gods of safety (and out of good habit), I do still chock her. But, after getting in a hurry one day and almost
backing too far on the ramps (ie, off the high end), I decided to make an alteration to my ramps:
With this arrangement, it would be a bit of challenge to
intentionally drive off the end of the ramp. Even with the front wheels still on a slope, the car is
level and is definitely not rolling anywhere. The chocks placed on the front are just additional frosting on the cake.