With 5vr still hitched
Raise the Inner tubes up fully
Extend the Outer tubes until you hear then click/clack
Retract then 1" and paint a RED Line -----that is the MAX extension you want to do so you do not damage drive nut/shaft/gears
With the outer legs extended......
How much can you then drop inner tubes
I prefer to not have more then 5 holes exposed and use a 6X6 block
You only need to lift front pin box just high enough to clear the hitch plate (1/8")
Watch truck bumper----when it stops moving then watch hitch plate
Stop when Pin Box just lifts off htich plate
Unlatch/unplug and drive out from under Pin Box