Definately just round the corners; think it's primarily related to curviture and not necessarily speed, it seems to be worst at left hand down a quarter rep. Will try your man and see what he thinks so thanks for the pointer.
Of course I've checked the nuts, what you think I am???
The thing just started on Sunday tbh otherwise I'd have quizzed you on it at the pub, and on the 'ahem' test drive... you looked far too comfortable in the Ibiza but if you lend me the 370 you're on next time!!