Thanks for reply's.
I failed to tell you that I do have an X chock. It made a difference in the front to back movement.
As far as the Steadyfast system, I looked at them very closely and noticed on my Keystone Sprinter I can't put them on the front because the spare tire is mounted on a winch in the front middle underside. Will be in the way of the 2 supports that run from right to left etc. And the battery compartment hangs down on the drivers side between the landing gear and the tire. So I have to go a different direction.