Part of the difficulty of this and other obstacles is when you have front and rears wheels trying to climb ledges simultaneously. Locked or not, this situation can be a problem.
Certain obstacles are difficult for jeeps with wheelbase =X, others for those with wheelbase=y, and others difficult for the Xterra because of our wheelbase.
I've wlked up some obstacles when wheeling with jeeps that caused them problems, other times, I get caught up because of the Xterra's wheelbase.
Run Golden Spike a few times and then you'll understand this and the 400 +/- other damn obstacles. I've run during EJS when a Jeep rolled on a simple ledge, because of minor problem with the line the driver took. Everyone has an opinion, he may had been 3 to 6 inches too far right, may have been too heavy on the right foot. This video unfortunately has been around and around for a couple years. It was a bad day for those who were there, luckily nobody got hurt.
It was fun to wheel with the driver because he was willing to try anything.
Todd