Yes my answer will always change over time as we get more info. I'm not Russian, and this is like guesstimating the weight of an elephant in a dark room. So yeah, ask me in a month or two and you might get different info. If that worries you, feel free to ignore me.
I have given a range that I expect to be the final range. I think I said 38 to 41 but I haven't done a detailed model for EU yet.
Last year they hit the max numbers in August on a couple of regions, so I think they will try and do that again which just leaves them September to sort out stragglers. Someone who rescheduled a November interview was given an August 17 date - in other words the tail end of what they expect to be the main booking time, the beginning of the stragglers. Last year, only AF made any meaningful progress in September.
By the way, the DS260 fiasco gas potential to change everything. I was thinking they would get this under control, but there are still obvious and subtle impacts showing. If something about DS 260 has changed response rates or continues to impact cases then it could have a significant impact, and even a small change could see a big impact on EU in particular. EU is the closest of the big three regions to having a sensible number of selectees, so if any of them get current or very close it would be EU.