OK, so I'm in a game as a Dragon Shaman 20 wielding a Lucerne hammer, and the fighter in the group is a BSF who dual wields greatswords. he said he can do it with the feats Ambidextrous and Monkey Grip (along with the usual 2W I2W and G2W) and wield them both at the same time with no penalties. Now it was my impression that the greatsword, being a 2 handed weapon, was considered a Large weapon. Is this possible the way he says and would I be able to mimic it with 2 Lucerne Hammers and the same feats?