Going to try to get this as well. One thing I am looking at though is we don't have a 1.25 ~` key and 1U control key on this. for those of us with ergodox's if we wanted to place it on there those would be the only things missing. candidly though I don't think the color sequence will go well with the massdrop colors (mostly buying for the RS II if/when we get the gb for it, but more options the better)
With anyone with that idea as well:
1.25 shift from ISO, 1u alt/win & 1.25 caps from tsangan/HHKB, and the rest is more or less already there. keep in mind that no button will match for space in that regard and the numberpad enter fits just right for the larger keys, as does backspace.