Yes, weapon mod changed my habits
From now on:
Flying Breguet, i always take the upwing Lewis addition
Flying DH4, i always take the 2 frontal Vickers + gunner 2 Lewis
Flying Camel, i always take the wing cutout
Flying DFW, i always take the gunner double parabelum
Flying Spad VII, i always take the upwing Lewis
That's about it for my current rides.
Sometimes the N17 upwing single Lewis, but not always cause of perf losse. As well as Dolphin upward 2 Lewis.
Some weapons are really a handicap...and rockets + additional gun is usually a big perf hit