Good point on the battery, but already taken care of
For some reason I didn't think to put in a photo of the underside, D'oh!
The cradle is open on the bottom, and I put in symmetrical cutouts so you can access the battery compartment clip, and charging port (We use the rechargeable batteries, so it can actually be charged in place), no matter which way you put the NXT in.
Oh, and I added some cutouts for weight.
I wasn't aware of the USB connector issues, thanks for the heads up on that!
I'll see if I can work something into this enclosure for that support.
LEDs might be possible, but that top panel is only 1/8" thick as it is.