Hello, quick update. I did some progress in the cockpit, and I wanted to share a picture before coloring it, just because I think it looks cool 
The only problem I have is that there aren’t a lot of pictures of this aircraft’s cockpit, and all the circuit breakers inscriptions are unreadable in its flight manual. I know that years ago the National Museum of the USAF had a 360° view of its cockpit. Unfortunaltely it has been deleted and I didn’t save it. If anyone has such visual documentation I would be gratefu!
Also thanks to the DCS community sense of detail about their F-5 cockpit (which the X-29 one is based on), I made it with the real-life dimensions they shared (so it is not just an “artist” view). I also learned about the standard MS25212 about pannel sizes.