I tried disabling abort on dropped frame, it plays back the footage (v) in slow motion, the audio plays in real time. I guess I thought that the HD Extreme card would drop down the quality of the playback and play it in realtime (like DV) despite the number of layers. Then playback full res when rendered…my bad. Are there any ways to bump up the performace of this feature? It makes layering a real chore and of course adds three time the amount of labor.