Oh ho ho ho, what fun photography is!
Wowcamera have asked me if I would like a replacement D500 of course I said yes!!
In the meantime the Sigma 150mm F2.8 macro turned up, nice lens and sharp wide open and it's well centered.
Excellent construction, mostly metal, Sigma made some nice solid lenses and this was one of them, tripod foot and all, just how I like them!