Thanks again, folks!
I may end up doing some sort of insert. We’ll see how the note goes and which pen I end up picking from the ones I still have on hand.
I used to make my boxes single purpose, with glued-in inserts, but a friend mentioned that it was a lot nicer if he could reuse a box for something else, so could I please not do that? And there it is.
I’ve got a big homer depot box full of various size bits of foam, and plenty of wood shavings, plus a roll of packing paper, so I generally end up packing things pretty well. The only packing material I don’t reuse are the stupid foam peanuts which get thrown away once I manage to get them off the wall, door, and pretty much everything in the shop because the humidity here is almost always low and they get stuck to everything.