i don't know if I have well understood Google translation (but images let me think so) he join sections edge by edge without any kind of tab or other support!!
And this one? I know this is not impressive like the radial engine above, but look how he builds things like this!!!
Not only for the difficulty itself. It's the cleanliness, the extreme precision... I'm speechless.
How we can contine to do modeling after having seen UHU02 at work?