Kevin, Those look good! I have a similar fenceline/guardrail setup with concrete bunks except a 1/2" cable for the neck rail where you have pipe. One thing I have found is that calves will scoot under the neck cable/pipe and end up inside the bunk, then out where they shouldn't be!

I put a couple wire cattle panels and tee posts behind the bunk but they would still get in the bunk. Finally went to plan B and put some scrap 1/4" plywood sheets (almost free at the lumber yard) and put them down between the rear of the bunk and the cattle panels so it cut the sight line out.  Calves now stay in and everyone stays calmer when they can't see out past the bunk.

Not a problem with the yearlings and over but 200-300 lb calves seem to be able to squeeze thru about any (non-electrified) opening with something interesting on the other side!

Bunk looks good. I like guardrail on those pipe posts.

Jim at Dawn