FSX/P3D. I know many of us are eagerly awaiting the MilViz Beaver which is now currently in beta stage. According to the dev team, the release has been pushed back a month do to things that need to be corrected. It's just a part of the life of simulation software development. But if it's half as good as the T-50 then it will be a stellar aircraft. Sit tight folks! Patience is a viurtue.