I actually made some ramps being that I did not want to chance it with the side points. They work pretty well but I like Mustang's idea of getting some kind of sticky rubber to put on the bottom. I did have the fronts slip on me once. You can check them out in my journal.
ClemsonWill's Journal
By the way. Home depot's machine was not setup to cut angles (so they said). I had to cut them myself with a circular saw.