The 'train of boxes' was used when attacking a point target such as a bridge. You should find the 465th attack sheet in the mission folder and see what it says.Not always and not in this case. The "train of boxes " was not the rule( the longer the train, the happier the FLAK ). In the "6 air front formation" the position of boxes could be the same in cruising and bombing. In the sheet to which my original question referred is clearly said "bombing formation".
Yes, of course. I told that only one PFF leaded the Group and aimed during the bombing run. The spares were inactive unless malfuctions or alternate targets needed their intervention.
When bombing by PFF, the Mickey Ship leading each attack unit sighted independently. Again, a review of the mission folders will confirm this.