The effort you've put into this book so far is amazing and appreciated by the whole community! I think everyone understands that this is a volunteer effort and you cannot possibly update it with every little detail uncovered in a random thread in this forum or elsewhere.
But I assumed that's what this thread is for - to collect the little updates or corrections meanwhile.
I mean to me in this particular scene it is so clearly that the screws are black and only partially covered with snow that I didn't think it is necessary to start a separate discussion thread about it.
Anyway, I've posted all the frames from the scene. If anyone sees a mistake in my interpretation, please point it out, show where the silver screws are. So far, unfortunately, it kind of went sideways and people started posting unrelated images in what shapes as another round of general silver vs black screws.