Looks like an aluminum welder on a robotic arm. Not discounting it, because I think the simplicity of doing it that way is brilliant for plenty of parts. Plus,

Looks like an aluminum welder on a robotic arm. Not discounting it, because I think the simplicity of doing it that way is brilliant for plenty of parts. Plus, I bet there was plenty of trial and error to get the timing and gas settings right for something like this. Got to give them credit there. Aluminum welding is a bitch (I suck at it). So, I'm not trying to rain on their parade... but a quick google search is showing they're not alone. To be fair, I think they might be doing it better though... especially when it comes to scale. A few minutes in, I don't see anything near to their scale, which is cool.