Looks great Scott.
Can't wait to see the finished product.
The large hole in the bottom of the console tub is from a factory DVD unit being installed. There are only a few of these out there. The CD changer does mount to the passengers side of the console tub.
I just completed a console for someone and I ran into the same problem.
I just took some spare flat plastic from a CD changer cover to make a patch in the floor of the tub. I just made a brace under the skeleton and screwed the patch to the brace.
Hope you don't mind the HiJack but here are a few more things to look at with the console swap that might help you out along the way.
Seat frame side bolster:
Helps keep the seat cushion in place. Without the support the seat feels mushy on the edge.
Original seat frame:
Bolster cut off:
Welded onto the new seat frame:
Rear console bracket cutting:
This will make it so you don't need to notch anything along the back wall (sub box or storage box) or if you cover the back panel. I have to do this with my consoles because you cannot remove the cover to give it enough room to go down and slide forward to lock into the rear floor bracket.
I was concerned that this would not secure the console enough and it would move or make noise. Not the case at all. When it's bolted down it feels like any other Expy/ Navi out there. It also makes it easier to remove the console since you do not need to remove any of the back panel parts.
I completely cover the rear panels on my consoles. To me, it just seems to flow into the console lid. That, and it is much less work to do in the end.
I do like your patch panel with the power point location.