I just found this thread, and what an outstanding build it is, I must say!
Being a former Viggen mechanic, it sure looks the part. Just one thing though. The fighter Viggen (JA 37) doesn't have the lower anti collision light. So before you go on with decalling, you might want to remove it.. ;-)
Just drop me a note if I can help with some pictures (maybe a little late..).
Regards,
Niklas