Adjusting front legs on 5th wheel

The RV pad on the side of my house slopes down to the back so to drop the nose of my 5th enough to sit level I must run my legs completely out. I etched marks just before they are fully extended because a fuse will sometimes pop if I "grind" them at the end.

I've messed up a couple times while setting up camping and it sucks having to hitch back up (I just hope no one from RV net is watching :))