If you are far enough away you can always basically see to the other side in the sense that eventually you can't resolve the forest

I did once manage to update Wheezy all the way to Bullseye on a live production machine, albeit not one doing super critical things. (I had just inherited it; I did not neglect it like that, for the record 😅). It did come out fine, shockingly. This time it was just my own ancient, disused netbook.

I gave up pretty fast 😅

It's part of a RF switch matrix, so yes there are some splitters on there, but also some switches and amps. Routing signals from lots of different places to either test equipment or to where they normally go.

They were on a very tight schedule, so SPT and EHT combined only got 5 minutes to talk, and no time for questions. Unfortunately these visits are always quite crammed.

Most of that pile is wool, so warmer than it may appear, but the big stuff (parka, insulated overalls, etc) are provided by the US Antarctic Program; I will pick up loaners when I get to Christchurch.

I suspect it's the same but I'm not 100% sure. So I guess it's tied for largest with the other GMT mirrors and also with the LBT mirrors.

Here's a 6.5 m mirror for a different project. It was cast in 2019 and is now being polished.