FSX/P3D. And I 100% approve!! A1R is one of those super highly talented development teams that I really wish could release more products. The time frames are really long but the end quality is always nothing short of magnificent! I'm totally getting this very unique airplane and I think if you are a fan vintage of lite sport aircraft, you should check it out too. I'll try to livestream it. Thanks to ZK as usual for the tipoff!