Maybe I am missing something here, but I don't see the point in passing the full prescribed inside leg measurement to the FISO, just so he can write it on a piece of paper.
I wholeheartedly agree! These days my calls go something like this, after "Pass your message":
G-XXXX is a ----, from ---- to ----, presently at/abeam/5 miles North of ----, request FIS.
If they want any more, they can ask. They almost never do!
The trouble is, as an instructor I'm supposed to teach all this stuff to my students. What do I tell them...do it this way for the test and my way afterwards, or what?