The base model of Coxxon's was released with the original BSG pack a few years back. IIRC, Coxxon released the whole fleet for general use, then released the clamp-on armour and ribbing a while later.
I added them to my BC model, but something went screwy with the Nif conversion, and some of the ribs didn't show up. I tried messing with the normals, to no avail.
Still looked nice, though:
Coxxon's model is too roundy on the flightpods, and innaccurate here and there. I'd like to see someone take a really passionate look at the Bucket and really knock it out of the park for BC.