Might I recommend 32inches of 1" -3" PVC pipe (0.25" wall?) with screw-on end caps. Then each user before shipping can just clear tape around the connection and stick a label directly to the pipe on the outside. It'll be a little heavy, but tough as nails! :thumbup:
Thats the only way I ship cues. Looks like a giant pipe bomb but I have yet to have a cue or shaft broke since doing that.
Actually had one tube come back with the PVC end cap cracked. It was a 3 inch PVC tube.