Nice to hear from you. I am after 49h on air and airports from Vanuatu to Zurich (5 flights)..., so will keep it short as I can...
Per your request, I checked the images and biometrics and indeed it is Iduna rama - congratulations!
Here is why it is rama, not the most typical one, but still OK, and can be confirmed as this taxon. You can post/copy my comments if you like... I will divide the ID clues into diagnostics, favorable and negative:
Diagnostics for rama:
- faint dark smudge near the tip of the lower mandible (in the report it said that it did not have it, but in all images there is clear indication of it!).
- twitching up tail movement (the bird did not dip its tail downwards as Olivaceous).
Favorable for rama:
- short primary projection = c. 62.5% (2/3, rather than 3/4 as in as Olivaceous) of the exposed tertial length.
- only a weak emergenation to P6 (in the report it said that it did not have it, but in the image of the spread wing there is slight indication of it!).
- rounded wings with short P2=P7/8.
- grey-brown above with duller brown exposed primaries.
- outer tail-feathers tipped and edged rather boldly whitish.
Negative for rama:
- on the profile image there is somewhat appearance of paler secondary panel on the closed wing (but it is still too faint for typical Olivaceous, or still OK for minority of Sykesís).
- on the profile image there is somewhat appearance of a whitish mark at the tips of the folded secondaries (but it is still too faint for typical/most Olivaceous).
I hope it helps a bit, and congratulations again to all involved. I could add more comments, but I will do so later on, if I get the time!