As part of the ongoing heat management in my 3A, I have been thinking some time about crimping the horizontal bars on the grille to narrow them and improve air flow like pictures of early 3As and others have done (such as Hoge's racer). Been practising on an old scrap grille I picked up and finally worked out a technique that would crimp across the width of the bar in an easy, single, neat movement that didn't damage the bar. When I attempted this yesterday on the grille fitted to my car I