What two good ideas concerning combat aircraft did the Germans borrow from the Allies?

The allies had two main differences with the germans, one of them was they had to flew for a longer time and a longer way to reach battle field, the other one is they had electric starters for their airplanes making it easier to start in every climate situation you may face.

The germans copied the big tank fuel, and the bigger cockpit, also the electrical starting switches, prior to this the germans had a hard time starting their engines in the cold russian weather.