The video is quite amazing, but I think he made several crucial mistakes: never drill, file or arc solder anything with tiny and sensitive electronic parts arou

The video is quite amazing, but I think he made several crucial mistakes: never drill, file or arc solder anything with tiny and sensitive electronic parts around! A bit of metal in one of the PCBs is enough to ruin the day. The other thing I noticed is that he used the welder without full protection in both hands: the arc gives out UV, besides the hot metal flying around, which is dangerous. A funny thing is the construction/design as it goes along, I do that sometimes myself, without designing it first with a CAD.