Hi Ian Websell – I know you said you fitted some wind deflectors to your Kona – I have just ordered some in plastic chrome for my Kona – having done various research I concluded it was worth the risk of not liking them – less than £50 on Amazon – I understand it helps with wind noise on motorways and allows for window to be cracked open for demising air circulation etc – thus not as much need for a/c or none at all – just ventilated seat – I would be interested in your view Ian – I seem to remember you fitted them soon after getting your car – I will give it a month then give my conclusion on them – I have never used them before – I will fit them on Monday after Sunday delivery.