Sheet metal adapter panel to reduce the large switch panel opening of Mk2-on lower dash rails to allow installation of Mk1 switch panel. It is held in place by the original screws, and can be used without welding if the dash is covered with vinyl as original on Deluxe and Cooper models. It can also be welded into place and the weld dressed for a finished appearance if the dash is to be left in a painted finish. Since early lower dash rails are very difficult to find, this panel allows easy conversion of a later lower dash rail. A neat idea!