Stabilizing a 5th Wheel

We bumped up from a TT to a 5th wheel in 2004. My old trailer was solid as a rock! We have a tripod for the front, but seldom ever used it. We have now bought a 2016 Wildcat and I can't get it stable. I have put our tripod under the front and lowered the rear stabilizers. It still has a lot of "shake" compared to our old one. Is there another way to brace these 5th wheels?

Thanks in advance for your help.