Paul, I recently sold mine. I shipped it packed box-in-box, with styrofoam peanuts around the lens and between the boxes. Light boxes, though. The parcel weighed a little over 8 pounds.
When thinking about a long lens, always keep in mind that for "normal" lenses (not telephoto, not retrofocus) flange-to-film distance at infinity is approximately the lens' focal length. Apo Ronars are normal as normal can be.
And now I understand why people who shoot ULF tend to use lenses that are normal (or shorter than normal) for the format.
Cheers,
Dan