Ted:
I am confused by your post on the load warrior by Yakima. I have one and it mounts on the two crossbars--all the weight is in the crossbars.
All the load warriors I am aware of are the same way. Are you using a modified mount?
Lee
[edit: just saw your post that they do mount to cross bars--but not sure what you mean about pressure on the rails. The pressure goes down on the cross bars--which in tourn are mounted to rails with the plastic OEM clamps that you tightenm with the torx screwdriver that comes in teh x tool kit.]