It's just not fast enough at 1920x1080. It may do it with the Komputerbay 1050x card . . . But it might also be an issue with the edmacs . . .
The Komputerbay 1000x is definitely fast enough. I can transfer 117mb/s through my Kingston 3.0 USB CF Card Reader just fine.
I think there are still some limitations in the programming. Honestly, we only really need to squeeze another 2mb/sec and then we should be good.
In further testing, I switched around a ton of settings and found there may be something eating up memory to control the lenses. I tried out a few Tamron lenses that my camera doesn't recognize and they gave better results than my L-series or nifty 50 Canon lenses.
While recording, I assume there is something in the program that is reading aperture settings or focal points, even when in manual mode on the lens. Has anyone else tested their speed in relation to having a generic lens on or not? I had all lenses in manual mode while testing.