So I bought the EOSHD Pro color settings a few days ago and after inputting them to my a7s (original, not mkii) I was unhappily surprised by a big color shift in some shades like the images I'll post below.
I've been messing with the settings a bit and I think it comes down to the color mode. For the original a7s, s-gamut is not giving me accurate colors at all. I think a better option would be to use one of the other color modes. I'll be doing more tests in the next few days, but right now I highly recommend not using s-gamut for the original a7s!
I love the punchiness, saturation and contrast of the EOSHD Pro Color settings so I'm really hoping to find a work around for my camera!