Fibonacci keychain

I have several spools of wire that were a bit of a mess. I was either taping the loose wire end or tucking it into the wire.

I thought a plastic clip to hold it in place would be a better idea - here it is.

The spools I am using are typically available from Fry's, Micro Center. They are all about 50mm diameter fully loaded and go to about 30 mm empty. I created two sizes for each of two reel heights, one for a mostly fully spool and one for a mostly empty spool. Unfortunately I don't have a mostly empty spool so I was not able to test the 30mm size but I don't know why this won't work.