Let me play tonight and see what I can come up with as far as the second issue. If anyone here is able to replicate the issue a SS would be most helpful.....Personally I haven't ever seen scenery disappear..... Sometimes weather updates are a bit harsh in X-Plane, if the update is drastic wind speed can be reported much higher then the previous report. This would explain how the aircraft can perform differently after an update.... SkyMAXX doesn't effect how the weather is reported, just presents clouds... From what you are telling me I think this is what you are seeing...... If the pause between updates is heavy on your sim, I suggest revisiting your rendering options and SkyMAXX UI options. Elements such as crepuscular rays or water reflections hit lesser systems pretty heavily. Additionally in the rendering options draw distance, shadows, texture resolution and water refections are also heavy hitters.....