Oh I like the addition of the Coinkite logo!

Nice! Consider getting some PakLites to put on the 9V batteries. They act as covers for the leads, and also emergency flashlights for signing your ColdCard transactions in the dark.

Pak-Lite's Official Website (9v LED Flashlights) - Pak-Lite's Official Website

Official Website -- Pak-Lite LED Flashlights snap to the top of a 9v Battery and provide light for up to 1,200 hours.