Oh, I posted a reply to this last week from my mobile, but it looks like it hasn't saved!!!
Mixed feelings about the custom - it's very well put together and painted, but the face ruins it completely. It looks like Snake Eyes (or Stalker for that matter) and even if he just filed down the goggles and filled the breathing holes then it would have looked better. Sometimes the most disappointing customs are the ones that are 99% brilliant, but 1% off, and whilst there's no doubting i's well done, it still looks too much like Snake Eyes. Stick a hollowed out vintage RS head on and it'd look a lot better. However it does make a change from Crimson Guard heads.
I have to say, of all the RS customs, the original head hasn't been bettered. Ross's skull mask is about the best redesign I've seen done so far.