I believe Saburo Sakai commented on feeling sorry for the Bf109 pilots in the Battle of Britain because they had to focus on fuel so much that they couldn't focus on the fighting.
Puma44,
The problem with DTs is that, on some aircraft, they leave shackles behind that cause drag. The Mossie loses 4mph off of its top speed due to those shackles still being there after the DTs are gone.