Im much the same as you and have been reliably informed that one of the major causes of this, assuming that grip and stance are ok and of course your swing plane is fair,is that on the backswing the right knee MUST remain flexed as at address.It does help believe me but if thats not the cause i would recommend this gr8 site http://www.golfpro-online.com/physio...yourswing.htmlGo to the tuition 1 series by Leslie King.Mark.