The conversion of A stock required the installation of a door control panel upon the driver's control desk. The alloy back of this unit showed through the window, blending with the alloy bodywork, giving the impression of a smaller window on that side of the cab. photo I thought that added to the character of these trains, and reminded me of American subway cars. It was not to last long, as the back of the panel was painted black when the units were turned out in corporate colours upon refurbishment, causing the frontal appearance to return to a traditional even look. I guess the aesthetics were judged worthy of this extra cost, which would have been small compared with the whole refurb project. Did anyone else feel sorry to see this unique look disappear?