Peter,
It just so happens that I'm building an "Imitation" and here is what the nose construction looked like before sanding took place. That should clarify the structure pretty well. You can't imagine the amount of dust that was generated to change the structure in the photo to a nice, oval shape to match the firewall.
One point you don't want to overlooked, is the 1/4" wooden dowels that help strengthen the firewall glue joint, however, with your electric application, it probably is not necessary, but wouldn't hurt anything.
Cheers.
Warren Wagner