Jim Jakosh
.....
Hi Alex, I'm not following on the" yea olde folding Butt"??

Most may think of padding... sorry for the wrong "butt", but,
An older name for a dartboard is "butt"; the word comes from the French word but, meaning "target" or "goal". 
maybe I should have replied en français.
Surely with a bit of enginuity you can fold it yup and hide it in the box.

PS. Not all my comments are below the navel and at least your question earned 2 more hits towards the comments tally.

If your first cut is too short... Take the second cut from the longer end... LBD