FSX. Quick note from from PMDG CEO RSR: "Captains, We are currently doing a bit of integration testing with the 777-200/300 SP1c update that is pending. We anticipate that this will take 2-5 more days depending on how it goes. (We have a couple of minor items with it that we are working to resolve...) This update will not be as big as SP1, but it is bigger than SP1b- as it addresses some further refinements to the 777 that we think you all will appreciate. I'll list them out later... I am hoping that we can push the update in time for this weekend, but at the moment my schedule doesn't seem to be cooperating with that plan- so I just wanted to let you know we are close..."