Has anyone tried to move pin box up in Landmark?I would like to raise box 1 hole to get clearence for tri-glide jaw.Although there is 1 set of holes cannot raise due clearnce problem.I can get 1 bolt in each side of front row but cannot get back holes to line up.Box hits at top corner when I try raise rear of box to line up holes.I could lower hitch in truck,just not sure if that would create a problem w/bed clearence and lower jaw.