How much weight savings is there really? Guys here are mangling thick steel skids (belly guard comes to mind)... an AL skid of the same thickness would get trashed quicker so it either needs to be thicker or have more reinforcement which cuts into the weight savings.

If anything I'd think corrosion resistance is a bigger benefit especially for a trail rig that you don't clean after every run.

I guess someone needs to buy some aluminum skids so we can compare.