Cable Reel stackable

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:3420927.

I butchered Manabun's lovely design with my poor Sketchup skills, but now the large USB cable reel is square shaped and stacks nicely for the semi-permanent cables around my desk.

I wish I would have noticed sh0tybumbati's gripped version before designing this.