I have one of those tubes. I got it in a box full of stuff from an estate. I looked it up at the time and decided that it's not something that I'll ever use, so I did with it what I do with most things that I'll never use: I kept it.
VERY wise decision.............I do the opposite and when the need arises, I go back out and buy.........BIG junque boxes and large sheds that are organized are the only way to go in this hobby.
at some point a boat is a ship, and a shed becomes a building. What is the defining point between building and a shed? Lights? a/c? How can one say when one is in too deep?