The only other time I have heard of a B-26 using its package guns air to air was when a BF-109 made a pass at a B-26 formation and one of the bombers on the outer edge dove after it, shot it down and then pulled back up into formation, to hear "Good Shooting!" over the radio. But I assumed that the bombs were already gone in that case. And I have heard of only one case whee ETO B-26's were instructed to hit a target and then go down and strafe. The bombardier's nose .50 cal in the B-26 could not be installed with the Nordon sight in place so it had to be removed after the bombs were dropped and was handed to the navigator in that case.