Highly recommend the x-chocks after setup, they take so much of the movement out of the RV, something the rubber wheel chocks are not capable of doing since they are designed to keep the RV from rolling, not the movement that is felt when walking in the RV. There is even quite a difference between having the stabilizers down alone and having the x-chocks in place...
I have read what appears to be some folks using the x-chocks to "chock" the tires. Per the Mfg, they are not to be put into place until the RV has been disconnected & leveled or damage may occur to the x-chocks or the RV. YMMV
As for the truck ball height
When the truck/RV is empty, which is how the install was done by the dealer at PDI..., the ball is over 1" low, when everything is loaded up, it's 2" low.
Yes I can raise the ball on the truck, plenty of adjustment there...
My next adventure is to get the truck/rv onto a CAT scale and confirm the numbers
Thanks, Rick