So I got a 4-stop ND filter, recorded at 3840 X 2160 30fps in the RAW format. 4 clips, output to 1920 X 1080 30p. ISO 100 @ 1/60 shutter speed. It is a very flat file, my next step is to color grade it and post process it to see how much I can improve it. I may be able to get to it tomorrow...