I'll say this again: Difficult up close, even harder using photographs, and migraine-inducing when using digital images (at least when the image resolution is so small that it's hard to distinguish between pixels and stitches).
There are a few areas that are obscured in the photo (this is IRPA Obj# 43380) but I have the main motif worked out. I've adapted it to be repetitive, so that I can use it on its own, but at some point I hope to work out the whole thing. May need to wait until I can visit it in person though.
Here's my redaction thus far (colours are not meant to be exact):