Hexagonal sticker design using the logo with add-on tiles to expand the annex.
This complies with https://github.com/terinjokes/StickerConstructorSpec/ and so is intended to combine with other hexagonal stickers.
Some of the add-on tiles contain enough white-space to add other art work as desired.
It includes some smaller tiles that can bridge between hexagonal and square/regtangular stickers, as illustrated in https://github.com/terinjokes/StickerConstructorSpec/issues/13.
License: Same as git-annex logo; Joey would appreciate spare
git-annex stickers mailed his way, but does not require it. 
Rad! Cant wait to add it to:
I like the idea of adapters too
https://www.stickermule.com/ and https://hexi.pics/help_en both print high quality spec compliant stickers.
I don't usually like any decals on my stuff.. but I've never come across this before and it looks interesting. I'm really tempted..
However, I wouldn't be able to do it without having some nice way of dealing with tolerance stacking. The overlapping stickers (bottom-right) on the photo above would drive me mad!
I went ahead and raised an issue in case they want to deal with this in the specification by having a(some?) guide specification(s) too.