Yep he'll be getting a new bottle but what I was saying was that since it has been difficult to fully close I reckon he hasn't closed it completely resulting in overflow and subsequent heating. However right now I have it properly cranked down hard with no leaks and he has managed to get over to Byron from Nimbin in the heat of the day with no issues so I reckon we're on the home run. What a silly saga as overheating so often is, just thankful it seems to be much less serious than we had thought. WC [worst case] was not justified this time with any luck.