David,
everytime I walk past the delivery section in my company I wonder what "sending from and to" of these quite sensitive instruments will do to the calibration. There are always some instruments sitting on the shelfs waiting to be picked up for calibration. Naked, not packed in some special purpose container or such. If I was the instrument :-) I would prefer having me calibrated on-site, with nothing more than a trolley to be put upon and back in the rack when finished.
cheers
Martin
Martin