Very good pics! I've never seen some of those, but now I can see there is something like a two lenses stereoscopic device under the black hood and it was not some kind of observation platform as I supposed. the hood may well be some kind of rotating cylinder covering the device when it was not in use, but I wonder why have them it painted black under the Mediterranean sea...
What also makes me wonder is the height of the Barbette base under the RF which seems to be quite high and slender, probably slightly higher then the device itself. With no parapet installed is really stands out! I wonder if I correctly calculated the height of the quadripod, because the top of the Range finder doesn't seems to outreach the top of the 4 legs where the top range finder base starts...
Now, if I try installing the range finders on the platform like I did on a pic above, they seems correct but I came to the conclusion that they were too small...
Looking at the scale drawing I have the height of the structure is correct, so may it be that these RF are smaller then I suspected?
On other, more recent pics anyway, the Barbettes looks pretty squat rated with their height, like if they were inscribed in a cube. I hope they did not changed the whole stuff during one of the re haul of the ship!
I need to do some experimental tweaking of the ones I already made trying to resize them a bit and see what happens before starting with new ones.
I used a smaller Barbette there (about 1.1cm instead of 1.2) and a bit higher then what I've drawn here so may be the problem is an over-scaling of the platform itself...

This one is amazing and very crisp! I'd like to get the "not scaled down" version if it's better and you can send it to me.
You can see the parapet is very similar to the one you find everywhere with a flat profile and two angles. you can also see the shape of the hood which now I suspect is metallic and not canvas. It has the exact size of the central section of the parapet meaning that probably the device itself has that wideness and the lower rail is just to help keeping it dry in case of rash weather.
Also, there is a man sitting beside the device on the other RF, meaning it has to be quite small and that the top object we see on some pics is probably a hatch to get there.
Let me check and I'll post something tomorrow.