Hi’ @troodon
Thank you for your post.
My first reaction: This is a surprisingly good result! Why do you need film negative when you can create such a good result just using the basic RT tools? However, after a closer look at your pp3 it seems to me that it is not so straightforward to get the result using only the basic tools.
First of all you apply a reverse tone curve:

And you also use several other RT tools including RGB curves (R and G channel). Therefore, I think that it requires much less RT expertise to obtain a good result using film negative.
@rom9 what do you think?