At that point it's not a restoration. You're building a million dollar model kit from scratch, using original plans and custom-made and custom-cut parts, but in all honesty it's not much of a restoration. I get that's the term for it these days, but when 99.99999% of a plane is trashed and ruined and all of it is swapped out for identical parts -- but made out of fresh, new, materials -- then IMO it's a new build like the new Fw190s.
Sorry, not to detract from the accomplishment. I just disagree on how the industry classifies the work being done. The work is awesome, but let's just call it what it is. New fabrication using old plans.