I've been following this guy from Estonia for years. His projects just keep getting better and better. This giant scale PT-17 with a radial engine is his masterpiece. This is his flight video and previous videos in the series include detailed descriptions of its construction. He uses just about every automation tool to which we modelers have access. He mixes laser cutting, 3D printing, metal forming, use of fiber composites and more. I wish I had half his toolkit. It's a beautiful thing to behold.
Ollie
Ollie