Actually I was planning to swap my AI models with AI Aardvark lol.   I just keep what hasn't been made for AI yet.   And it is a little hard to model 360+ airplanes/choppers and texture the "God knows how many" airlines there are in the package making them Captainsim or even Abacus quality. You said "Using the default I get good FPS". Well look at how few AI planes there are default. With my traffic installed I could see EVERY single gate filled with AI traffic at KLAX. With default only 40% of the gates were filled.