The feedback form specifically says that it can't be removed. I realise that in reality, it can be, but this can only happen after much discussion; how often will you get that from someone that couldn't drop you an email asking for redress? I don't leave feedback til the buyer does because for me, that's when the sale is closed. He's got the goods in hand, he's happy, I'm happy. If he's not happy, I want the chance to fix things for him, and we can do feedback afterwards.