Experience with trinocular microscope in watchmaking?

I've found it very useful.
Most of my work is done with 3x magnifier spectacles as I find it difficult to use loupes. When oiling it's extremely handy to be able to see what's happening, especially when greasing pallet stones.

Also useful for recording steps in servicing or providing examples of wear/damage to clients.

My camera is hooked to a NUC and a USB powered monitor.

I have one that swings over my lathe.

Mostly use is tor electronics rework. This came off of an old rework station.

There is mounting for a CCTV camera which I have never used. I did get a couple of USB microscope cameras. I find that these work best for inspection.

One issue is that over the years (decades) the mounting block has come loose and the whole thing droops too much. I need to pull all this apart and stabilize it. I did place a second mounting block on my bench. That way I can swap it over should I need to used it there. Until recently I had my bench lamp attached to the bench mounting block.

For most work I used optivisors with as I recall a #7 plate. I also have a clip on loupe, and several traditional loupes for when I need more magnification. I find longer focal (working distance) is preferable to high magnification.