Decided to make an SAO for the DC31 badge slot. It's got Nyan, RGB LEDs (addressable, of course), a Simon-like game (that gets longer every time, but you can reset that), and a standby mode when it's inserted!
(Excuse the render, the exposed copper is all silver)
Details
Making 50
Asking for a $10 donation
Green with Silver artwork on the front and white on the back