That is REALLY slick so far! What a wonderful job!
Thanks.

Only thing that still needs to be done is to very slightly lengthen the tearducts. It was arguably the most difficult part of fixing the mask with the tools I had at my disposal.
I've been thinking about what I would do differently if I started again knowning what I know now. There are a small handful of things I'd change, for those who are trying their own for the first time.
1. Take the nose piece out before the heat gun if you're using that to fix the flare. It's a lighter plastic and it warps extremely easily. Take it out and glue it back in afterwards.
2. Do the nose ridge details and tearducts last. With all the sanding and touchups, I needed to fill them in and redo them afterwards, it's just duplicating work you don't need to.
3. Sand less initially, with a finer grit sandpaper. Saw someone else mention it, it's easy to scar the plastic and it's a pain to sand back down afterwards. The only parts I should have sanded with low grit count were the parts I was putting sculpt over, for better bonding.
4. If you're correcting the flare, do that first. I squared off the "teeth" of the mouth grill, and some of the edges were melted a bit from the heat gun. In hindsight, would have been less work correcting the melted parts if I used the gun first.
5. Don't cut out the mount in the dome fully. The dome is quite heavy, and the sculpt needed to remount it added to that.
Hopefully this helps any other newbies trying it out for the first time.