Tbh, those fps worry me. Add a custom airport and what happens? 33 fps on a bare runway, outside the 3d pit...... Sounded too good to be true anyway, again. This is precisely why the test was conducted in an area with a massive amount of objects. The autogen, trees, and roads were set to extreme for good reason, and show a case of settings most people do not even use. As SkyMaxx relies more on CPU to do its job rather than GPU, I don't see much an issue for concern as you bring up.