[WillyC]

On my boat they used thickened resin/putty on the backsides of your "A" area as well as the very top edge of the transom. It was very difficult to remove this putty from the transom wall but it can be done. I hacked away at the putty from the bottom and from the sides using a whole array of tools including various chisels, extra long screwdrivers and the long straight tire iron that came with my chevy truck.