well the technical department at Drayton agree that this is a known fault, it has been known for well over a year, and they have done nothing whatsoever to improve the design or at the very least explain this in the documentation. So, given that insiders the company themselves will admit privately that it's crap, you are prepared to say how good it is?
I've fitted loads, including one for my own use, with no problems.
So yes I shall stand by what I said.