Great tutorial! It had explosions, cats, and a Ninja!
But it could have used a passing mention on the issue of ESR. I think some of this capacitor plague we are seeing these days has to do with using general-purpose electrolytics in place of low-ESR caps. More and more power supplies use ever higher frequency switching regulators. The old aluminum electrolytics that were just fine at 60 Hz will get hot and cook themselves to death at 100,000 Hz. If it's a switching regulator, look for a replacement that says "low impedance", "low ESR" or "high ripple" in the spec sheet, otherwise you may be replacing it again soon.