It is a great write-up. Everyone is always claiming you have to use 0 or 2 gauge wire. I too use a quality 4 guage wire that is ran through the hole on the passenger side of the firewall. Make for a very clean install. I have had 0 charging issues and I use the sealed Westco Miata battery as well. Here is a picture or mine:
One of these days when I convert my interior to black, I will paint the bottom of the clear trim piece black and make it look even better.