After you have leveled side to side then unhook for truck
Then level front to rear using front landing gear
When you get it level front/rear LOWER the front landing gear legs 1"
Then go run rear stabilizers down with 6"X6" block under their foot pads until tight. (block keeps stabilizers from having to fully extend....wider stance)
Now with rear stabilizers set run front landing gear the 1" back up to level
5vr is now SNUG
NOTE:
Don't forget.......wheel chocks
Set them FIRST before unhooking from truck
Then after setting up go back and check they are tight
I like between the wheel x-chocks to stop fore/aft wheel motion