If we are back on track I have a few comments. Based on what I remember of the thread there seems to be a plan for DSC to go into at least small scale production with this via kickstarter.
Stuff I like :
Unified back panel with Audio and Midi IO in one place looks great.
Unified PSU?
Stuff im not so keen on :
Philosophically, this seems like a large, not portable, expensive way to solve a problem that already has small, portable cheap solutions. I don't quite get the point? However if it is a personal vanity project for fun it is AWESOME.
Are you planning on having a cut off with your kick starter? Could you handle 20 or 50 or 100 orders?
What are you planning for after sales support? There seem to be an awful lot of things end users could have trouble with here.
As was raised earlier I think the interface / access to the internal carts / dials / buttons needs a fairly big re think.
I remember using my DMG with a PSU being impractically noisy is this going to be an issue?
Ideas, have you thought about a kick starter for an enclosure and a PSU with all the nice plugs and a nice (re thought) control surface with a nice detailed BOM and build guide? Then people could build the arduinos and source the carts, backlights, gameboys (none of which are particularly hard to find) and it would keep the project cheaper, easier and faster for you to produce?