A venerable work of Art!
Bravo!
Personally I'd probably forget about the AC outlet inside as you would have to get it safety certified if you incorporate any Mains type outlets and wish to sell it as a product.
If anyone ever got shocked or it caught fire, you would never get out from under the lawsuit... just my 2 cents.
That is why mostly all these things come with a power brick, all you have to do is buy an approved brick and it's not an issue anymore with your device.
And I am absolutely loving the Hose Clamp on the Interconnect...
(Dont show that in the Pictures of your Portable Rig thread, there are a few there that would profess the sonic enhancement of gear type hose clamps over compression fit...)