For the time being, I can't specify why the Grail strikes me as Eve. It's a general sense -- a kind of mood or intuition. Among the spirit driven, it seems to me, there must be a reconciliation between Adam and Eve. I find this sense in the knights and their obsessive quest and how the Grail continues to elude them. I guess Adam has yet to find the right approach to receive this forgiveness.
Maybe I need to play off of your take in this regard. How have you connected the Grail with Eve?