I set mine at 340C to 350C. When I solder the center pins of the triacs on the Express (they are thermally connected to the heatsink. I crank the temp to 400-420C. You mentioned you had experience soldering years ago... it will come back to you.
1971 to 1975. I do expect to remember, but almost 40 years.
I remember the scariest thing at Hughes was when they testedt the wiring harnesses for the F-14. They called the station the Hi-Pot for High potential. I thin it was 1-2000 volts. If there were any weak spots in the harness there was a sound like an explosion and the system shut itself off.
The harness was toast, better there than in the airplane.
I also remember the wave solder machine. 3'x5'. we used it to fixe the backplanes of HP 2100 and 21mx computers. That was an 8 layer board and there would be bad joints say between layer 2 and 6.
those were the days ...