Quick update to my post on 2.8.14: the unit was replaced last week under warranty as it was just under 2 year's old since it was replaced the first time. The original unit was just over 4 years old when it packed up, but I was offered a 30% goodwill discount at that time. Because I contributed the majority of that replacement cost, this second replacement was covered 100% by warranty. However, I was told 'that's that' for any further warranty, as the new one will not be covered should it fail - "there is no warranty on warranty". I do still have the failed first unit but I don't think anyone has come across someone who can repair them reliably - am I right? I am not at all confident that the new unit will be any more reliable than the previous 2, so I'm considering my (very limited) options! Any comments anyone?!