This is amazing! I've always hated soldering copper pipes because most of the time they don't leak, so when they do I have no idea what I did wrong (I probably do one job a year, very occasional). But now I get it. I'm a bit of an info nerd, so too much information is just right for me. Telling someone how to do something is usually enough, but for thick heads like mine, explaining all the chemistry, techniques, etc, is a huge help. I especially like the vaseline experiment. Now I wanna try other stuff... shampoo or conditioner?, dark beer?, hand lotion? sometimes I have a runny nose....