If it helps, the art of book for TROS is suppose to be released at the end of the month. Could be a clear picture of the saber in it.
possibly.
At this point really I think I have a solid sense of the outer structures. That windvane inner fan/impeller is what I really need and is the last remaining mystery. None of the photos yet have high enough fidelity AND focus of that spot exactly to clear it all up.
So call to action: THAT is what I need. Pics to get a clear sense of what is going on inside that windvane shroud.