So, I was looking at your book and saw the ps1 handheld game build. It got me thinking about a portable Sega Genesis. Yes I know they have one called the the Sega Nomad. I know that a game company called ATgames makes a small Sega Genesis with like 80 preload games on it. So maybe taking that system with the style of the nomad and you would have a sega system that fits in your pocket.