I realised after starting this that Mike (strongmanmike) had posted a very similar orientation is his Mystic Mountain post (wonderful work Mike btw).
This was just "accidental" in my case. My main target was M83 but had an hour or so each night (over 3 nights) before it rose high enough, and so grabbed some H, S and O data on Eta over those 3 early evening periods whilst waiting. The angle of the camera was set for a good guide star for the OAG on M83 - and happened to coincide with this angle on Eta that Mike championed. So ... apologies, Mike, for any perceived plagiarism!! But once I realised it was similar to your angle and saw what an interesting result you'd got, I stuck with it
Taken in suburban Adelaide with a GSO RC8 and ZWO 294MM Pro on a Astro-Physics Mach1 mount. And kind of as a consolation for the fact I wasn't able to image at a gathering in a dark sky site this weekend - curse you COVID!!
Full res on Astrobin
here.
I find it very reminiscent of the Fighting Dragons of Ara when presented like this.
P.S. There are a couple of faint reflections of the secondary of the scope here caused by the ultra bright Eta Carina. I should do something to process that out ... or better still somehow reduce the reflections. Tips/ideas appreciated.