Just some up-em-dates.
Molded the finished side in silicone rubber, once cured, I gave it a plaster bandage shell for support, and pumped out two castings with shitty hobby store resin (the last time I use that).
Of the two shit castings I used the least bubbly to help keep proportions the similar on the sculpt of the other side. It's still a work in progress but it is getting closer.
On an unrelated note, I recently took up bookbinding. While working on the Ra piece, I was alternately working on a book/CD case for an extra copy of the Skyrim soundtrack I got ages ago. The book is gonna be turned into a copy of "An Explorer's Guide to Skyrim" with the discs inside: Shawshank Redemption style.
Because I'm so clever.
But, that would've been embarrassing to watch.