I have been scale modeling for over 55 years. Though my specialties have not been in metal, I have done significant subjects in perfect scale. Done this also with RC airplanes and helicopters. Finally after years and years I learned that almost scale is good enough to have loads of fun with and there isn't the fear factor of crashing and destroying the whole thing.
But, this build is one of the most, if not the most amazing builds I have ever read. Less than 1 year!!!
The only grievance about all this is that the early machining and design weren't clearly shown. If I end up going there, there will be many questions. Not having a mill or the tooling, not sure if I could justify the tooling cost to build one.
Again, absolutely amazing head cad work. (Ya I think it is easier to make it from the mind over draw it too, and those computer cad programs take forever to learn and just don't click.)
And for those that have joined since all this, this is a good read.