The mk Ix is the second most produced spitfire. The Mk IX was built as a stop gap but became the second most produced spitfire, it could out turn a 109, 190 and had great speed climb and armament. There is one that may be developed, but has not been oked by the Igor, so i don't know if we will be developing, just currently learning coding and looking for a coder, and waiting for main 3d model program to arrive.