A good source of mercury tilt switches

The Leader LVM-5863A. You may be able to import one from the US or Japan, but you will need to do some conversion from PAL to NTSC and also find a way to power it.
It takes some old battery pack type called the NP-1, but those are expensive, so any 12VDC power source will work for it.

If you are in the UK, I believe Ferguson rebadged the little color monitor on the left as their own, but it was made by JVC

I see your little portable and raise you my adorable field production monitor

No one wants to step into the ring with the Switch 2 and Steam Deck. I get it, but also, I genuinely have no idea who's splurging well over a grand for something being dommy mommy'd by Moore's Law.

Sadly I don’t have one
Maybe a Christmas present for next year…

Yeah, they definitely need to go.
I will replace them with their modern equivalents and these will go straight into the bin (or maybe I will try to force them to fail before that for some good fun)

I love open, well documented standards and APIs

I really would not trust this tiny thing to dissipate 1200w over a long period of time
I guess that is why it has a fan keeping it cool

That is how I found out about it too! I kind of want to get one, but this video has probably made the prices go up a bit

The best cheap 5K monitor is probably an old iMac with a display controller in place of the old motherboard

Well that is good at least. I was going to suggest using an insulation tester, but it seems like you have that taken care of.