Right! I can see how it would be fast then. “Just” tin all the pins, and when all the pins are tinned have your solder in a fixed position and then move your iron from solder to pin, stick the diode, and repeat. Cool!

Good to know, it looks very clean!

The diodes seem to be flying!

Practically, I guess assume you hold the diode to the pin, solder it, bring the wire to the diode and solder it. How do you hold the diode, the iron and the solder at the same time?