That's amazing work. I'm making a few Viggen panels myself, but most of mine are " in the style of " rather than accurate representations. That's for reasons of space and convenience.
Long term I want to build an accurate Viggen cockpit and I've managed to gain access to a Viggen so that I can photograph and document everything that would be needed for a build. It hasn't happened yet, for logistic reasons, but I'll share everything I find out.