Quote - With a look to the last four images at least, it seems that the central control desk is turnable, if not moveable at all.

I agree, the desk has to be on some sort of turntable.  It's clearly on an elevated platform.  I assume that platform can revolve given the evidence in these pics.

Quote - Think the second last image will give a pretty look to the dimensions of the total desk at all.

Yeah, there are some great ref pics here.   I hadn't seen some of them and I thought I had scoured several of the more popular fansites.

Great refs!