One other bit of nitpicking is that one of the fan releases - post The Fan of Reknown's original exclusive,
was the combining of the movie version of "The Trio" with
the soundtrack album's re-recording. This made for an awkward and redundant listening experience.(Was the movie version of "Il Trio" included on the expanded U.S. edition?)
Yet another bit of trivia is on the original cassette
versions of THE GBU. At the conclusion of "Il Trio", the opening acoustic guitar returns for a few seconds and then fade off. It sounds intended and part of the original composition, and not the mistake of the recording engineer.
Rumor has it that it was the wide availability of The
Fan's initially very limited release that convinced EM and
the other powers that be to release - at last! - an official extended edition. I was able ask Morricone himself
many years ago about more music from The Dollars Trilogy
being released, and he tersely answered - with a dismissive wave of the hand as added emphasis, "that it wasn't needed,
or necessary."(So there, you lowly, idiot fan of my western music!)

I too used to purchase those mono versions of lps to save a dollar or so, but after hearing true high fidelity stereo recordings on the then pricey system of a NYC upper east side friend(a '60's 1%er family), I was immediately
converted to the pricier stereo releases, though it was tough on my meager weekly allowance.