We use the between the wheels x-chocks and they really help with front to back motion, but do nothing for side to side. I've been looking at the JT Strongarm Stabilizers and was wondering if anyone had installed these and what you thought. They claim to remove 99% of trailer movement. Also, Cw has these things you can put under your steps to minimize movement when someone is coming into the trailer.
2012 Eagle 320 RLDS
2012 Ford F-250 Crew Cab FX4, 6.7l PSD
3.55 E-locker, Timbrens