Thank you for the feedback! I wasn’t even aware that exiftool outputs are actually standardized. I checked what I could with the few cameras I had available and noticed some differences between them, so I would expect different models to tag things differently.
If you’d like, I’d be grateful for a pull request on the repo that makes it work for your X-T20.
The tiny size of my LUTs is probably simply because they are 16x16x16 LUTs, as opposed to the more common 64x64x64. I could render them as 64 as well, but the additional fidelity is simply not needed, and I smooth them heavily anyway. It’s also trivial to render them as .cube files instead, if that helps. The repo for the LUT builder script is here, btw.