A system comprising: an implant having a wing with opposite first and second side portions, the wing having a relaxed state and an overlapped configuration in which the first and second side portions are overlapped; and a device for folding the implant into the overlapped configuration, the device comprising: a funnel body (500a, 500b) comprising a first portion configured to receive and protect the implant when the wing of the implant is in a relaxed state, a second portion proximal to the first portion and configured to engage and fold the opposite first and second side portions of the wing of the implant in a predetermined direction when the implant is retracted proximally from the first portion of the funnel body and into the second portion of the funnel body, and an overlap guide (515, 515a, 516a, 517b) configured to direct the path of a first one of the side portions of the wing such that the first and second side portions of the wing are overlapped in a predetermined manner and to prevent respective edges of the first and second side portions of the wing from butting into each other as the first and second side portions of the wing are guided into the overlapping configuration during proximal retraction of the implant relative to the funnel body, characterized in that, the overlap guide comprises: a slot in the funnel body (500a, 500b), wherein the slot is configured such that, as the implant is withdrawn into the funnel body (500a, 500b), the wing can partially protrude into or through the slot with a bias for one side portion of the wing so that one side portion will always be lower than the other, thereby ensuring the wing side portions are biased to overlap each time, and a flexible tab configured to gently guide the overlapped implant wing sides back inside the funnel, or an inboard scoop. an implant having a wing with opposite first and second side portions, the wing having a relaxed state and an overlapped configuration in which the first and second side portions are overlapped; and a device for folding the implant into the overlapped configuration, the device comprising: a funnel body (500a, 500b) comprising a first portion configured to receive and protect the implant when the wing of the implant is in a relaxed state, a second portion proximal to the first portion and configured to engage and fold the opposite first and second side portions of the wing of the implant in a predetermined direction when the implant is retracted proximally from the first portion of the funnel body and into the second portion of the funnel body, and an overlap guide (515, 515a, 516a, 517b) configured to direct the path of a first one of the side portions of the wing such that the first and second side portions of the wing are overlapped in a predetermined manner and to prevent respective edges of the first and second side portions of the wing from butting into each other as the first and second side portions of the wing are guided into the overlapping configuration during proximal retraction of the implant relative to the funnel body, characterized in that, the overlap guide comprises: a slot in the funnel body (500a, 500b), wherein the slot is configured such that, as the implant is withdrawn into the funnel body (500a, 500b), the wing can partially protrude into or through the slot with a bias for one side portion of the wing so that one side portion will always be lower than the other, thereby ensuring the wing side portions are biased to overlap each time, and a flexible tab configured to gently guide the overlapped implant wing sides back inside the funnel, or an inboard scoop. a funnel body (500a, 500b) comprising a first portion configured to receive and protect the implant when the wing of the implant is in a relaxed state, a second portion proximal to the first portion and configured to engage and fold the opposite first and second side portions of the wing of the implant in a predetermined direction when the implant is retracted proximally from the first portion of the funnel body and into the second portion of the funnel body, and an overlap guide (515, 515a, 516a, 517b) configured to direct the path of a first one of the side portions of the wing such that the first and second side portions of the wing are overlapped in a predetermined manner and to prevent respective edges of the first and second side portions of the wing from butting into each other as the first and second side portions of the wing are guided into the overlapping configuration during proximal retraction of the implant relative to the funnel body, characterized in that, the overlap guide comprises: a slot in the funnel body (500a, 500b), wherein the slot is configured such that, as the implant is withdrawn into the funnel body (500a, 500b), the wing can partially protrude into or through the slot with a bias for one side portion of the wing so that one side portion will always be lower than the other, thereby ensuring the wing side portions are biased to overlap each time, and a flexible tab configured to gently guide the overlapped implant wing sides back inside the funnel, or an inboard scoop. a slot in the funnel body (500a, 500b), wherein the slot is configured such that, as the implant is withdrawn into the funnel body (500a, 500b), the wing can partially protrude into or through the slot with a bias for one side portion of the wing so that one side portion will always be lower than the other, thereby ensuring the wing side portions are biased to overlap each time, and a flexible tab configured to gently guide the overlapped implant wing sides back inside the funnel, or an inboard scoop.