He needs a coach to fix his 4S and to teach him the other quads he's actually practicing.
AS I said, there is no need to fix 4S itself for him, because he is landing it perfectly in practice, what he needs to fix is to clear his mind and do it the same way in competition as he is doing in practice. And I think his 4S technique changed a bit under Orser development from what it was back in 2012