Just thought i would throw out an idea we came up with to keep your PD from swinging around while trailering. We cut a wood 2x4 first but found that after a few trips down some dirt roads that the PD chewed it up pretty easy. After some searching on the net I found a website that sold small "blocks" of UHMW. I bought one that was 1.75"x12"x12". Used a skilsaw to cut it and a band saw to notch it. Works extremely well and is tough as nails!

Yep it is a good thing, I seen a few people use it with wood before. The plastic will hold up better I'd think.

seen them made out of scraps of the composite deck boards also