But if you just hook it up as 1 PFD and the MFD it saves everything? It doesn't make sense to me, if you're splitting the signal externally how would the computer know the difference? Maybe the splitter is causing some kind of interference (try a different one?). Very neat setup, did you make those overhead panels and AP panels yourself? That's the most functional TBM sim I've seen yet, very impressed.
How about setting it up as the PFD and MFD (2 monitor system, you said that worked very well) and instead of trying to mirror the other PFD in your computer you just take the hdmi to PFD1 and physically split it with a splitter box and send the same signal to both PFD's. Your computer would only see the PFD and MFD. The two PFD's should be showing the same thing anyhow (I'm guessing). Neat setup. Would love to see more pics. I'm thinking of doing same thing - either building my own TBM setup with 3 screens or just buying the realsimgear tbm package (just doesn't seem wide enough for a TBM flt sim. Take care.