Best stabilization upgrade(s)?

TFin04 wrote:
We have a 31ft TT and when fully set up, still get some trailer rocking when someone is walking through the trailer.

I know we won't ever make it 100% solid, but I'm wondering what you found the best stabilization upgrades to be.

We have manual stabilization jacks and I know they sell larger versions.

I've also seen that a simple "X Chock" between the two tires can make a big difference.

I'm just wondering if you guys have used one or both of these, and which you think is the best value for performance.

Thanks!