There was also debate leading to different tactics between 1 and 5 Groups....I don't remember which group did which, but one of the groups used a greater bomb load and fewer aircraft to get the tasked weight of explosives onto target. The argument was that although you lost a higher percentage of aircraft because of their reduced manoeuvrability due to increased weight, there were less aircraft to attack and therefore number of aircraft/lives lost on each target was actually less. This did not help the crews of course, because they still had to fly their 30 Ops to complete a tour and the percentages of loss were higher on each of their missions - its just that because a tour took longer, statistically they lived longer before being shot down.