I ama new member with a 1.2 Auto Yeti, new in March this year. Now done 8000 miles, mostly on the continent. Does anyone out there have vibration, or more accurately a rythmic hum at 40mph and 60 mph? Noise is not evident at other speeds. Wheels and tyres all OK and in balance. Alignment also OK. Have seen a blog from another owner who had same problem at 65 mph and eventually traced to faulty ball joint. Any ideas from anyone?