Yes we can put it to rest. I still advise you to go to a museum and actually look at these tanks or if possible attend an event and see a demonstration instead of looking for something in a book or online. You will see big differences in optics if you do so. I am actually on base now and going to see if I can get permission to show you the sights of a Sherman. As of right now I have no idea of where to find a TFZ around here but I will get pictures for you if I can.