This showed up in my youtube auto-feed today, and I thought it was interesting enough to submit to the rest of HN readers in case people have never experienced "small" feature soldering. I knew SMD soldering was difficult, what I didn't realize was how absolutely miniscule some of these things are... Thought people might appreciate it. Skip to about 3/4 into the video if you want just to see the mindbogglingly small stuff.