Are you having forward/backward movement, or side to side? We ended up with the expandable jacks between the wheels for for/aft movement, and replaced the flimsy scissor jacks on the rear with a one piece side to side stabilizing jack system that cranks down from each side. Really made a huge difference for our adult daughter. She has balance issues and would not go in the trailer as it made her sick.
And yes, they are not cheap, but once you have it secure it is more enjoyable for everyone! Gotta keep the women happy, happy, happy!
2012 Z1 271BH
2009 F150,4.6 3V. 3.73LS,9.75"