Tail surfaces - 109F versus 109E?

[Graham Boak]

Which do we do ? All of them, of course.

There does seem to be an unexpressed absolute lurking in this thread: that there was only one standard of fin/rudder for the E, and only one other for the F. Therefore manufacturing plans that do not match existing examples must be wrong. I do not know how many different rudders were produced during the life of the 109, but it is quite likely that one set of drawings will match a specific production batch, whereas another set of drawings will match a different batch. To produce dimensions from source A, and declare source B's different dimensions "wrong", you must be sure that they are referring to the same production batch.

In British terms, the same modification standard.

Anything coming from a flight test origin may be immediately suspect, as a non-standard test item.