Looks good. I had a 95 Alti and never could remember why I didn't like it. After seeing your pics, I remembered. Awesome job on the fabrication, but I hated having the radio down below the environmental controls. Seems to work really well for that massive 8" touchscreen!
As for the usb problem, how long is the usb cable? Is the usb hub powered or does it get its for the usb itself? Sometimes a hub gives those long cable runs just enough of a boost to eliminate those weird problems.