Comics And Fosters

Newly joined, seeking information, your kindly forbearance is greatly appreciated if my inquiry is redundant.

British aircraft referred to as "comic." I am under the impression that the term is generally reserved to night fighter conversions which mounted Lewis guns on the top wing, apparently for the purpose of removing gun-flash interference from the pilot's forward vision. The only types which I know of that the term was applied to were Sopwith Camels and 1 1/2 strutters.

Questions:

Was the comic mounting a Foster mounting or some variant of it, or an entirely different design?

Were the Lewis guns on comic-type aircraft fixed in elevation? If so, at what angle(s)? If the elevation could be changed in flight, what were the options - i.e. only specific angles were permitted or the elevation could be changed within a range of arc?

If elevations above level were possible, how easy/difficult was it for a pilot to hit an aeroplane flying at a higher altitude at a reasonable range? I assume that a Zeppelin would not be particularly difficult, due to its size.

If the comic mounting was NOT a Foster-type mounting, same question as pertains to a Foster-type mounting?

All information is GREATLY appreciated.

John Simanton