Thanks ATXKJ...

I understand being flat to slide over rocks.....but in this case I think it was a consequence of minimal tooling & design for shaping and forming the sheet metal.
I'll probably end up putting spacers on it and cutting out some areas where it is contacting the differential....perhaps spraying some urethane foam on it. I cannot recommend products that I have to rework to render acceptable - especially expensive ones.

tjkj2002, it is a design issue that may be more obvious because this is a CRD. But even with a gasser there is a major weakness with the design the way it is - which I partly fixed it today.....I will post the pics of the fixes later. Here is some of what I did:

* After using a hammer to pound it back into shape, I shimmed it 5/8" so it wasn't smashed up against my differential. It was obnoxiously loud driving down the road and was damaging the differential since it slammed it every time I shifted into reverse. (In a few short days of driving the bottom diff bolt was already rounded on one corner and the diff had large wear marks on it.)
* I drilled & tapped some holes around the large opening located near the front bend of the skid plate and then placed a section of 1/4" steel over it. Not sure what this big hole is for on the CRD as the drain plug is further back and not covered by this skid plate. (Thus why I need the tranny skid plate that takes off where this one leaves off.) Perhaps it gives access to the drain plug on a gasser? Either way, this large opening is the most commonly struck spot on my KJ and the rocks snag it because of its orientation to the angle of the ground. It is also a weak spot. With the strong, removable plate I placed over it, strength and rigidity is significantly improved.
* I coated the topside with an entire bottle of undercoating and then placed a thin sheet of dense urethane rubber on top of that in order to reduce the speaker effect.

It no longer clanks loudly when shifting from reverse into drive, it is no longer hitting the diff, doesn't rattle in 4wd and is no longer noisy going down the freeway. When I get the time, I will cut out the section around the differential and axle and build a a small, inverted ramp over them. This will give that area the strength and clearance it needs to withstand impact without smashing up against the very parts it is tasked with protecting. It will also allow me to gain back the 5/8" clearance I lost putting in the spacers.

As new, this product was incapable of working properly on my CRD. With the fixes, it is marginally useful. Thus, I cannot recommend this product.