Very last one in the world (I hope) I'll ever have to assemble

Yes. Flux is old Kester 44. We dilute it 1 part 44 to 2 parts isopropyl

Solder is Kester Sn96.5AG03CU51.1%. "It was a learning curve."

Reason we use it as I understand, is that we have sold a few chairs overseas, and Europe demands Pb free. I'm not certified, I've no idea what the current law is on this type of thing. For my own use, "lead"

The irony, is that just before I interviewed for this job, I'd found (new to me) a couple of Metcal soldering stations on local C/L. Got two complete ones for 50 bucks ea. If I'd known how cool they are and what they are worth, I'd bought all 7 or 8 that he had.

And.........it turns out the company uses Metcal which is what you see there

However, tips/ elements are a bit expensive. I still have some different Weller stuff, and still use that for my own stuff