All in all, it is probably not practical ever to publish the Op.87 as a complete set: it is hypothetical in the extreme to suppose that any church would (again) make use of it as designed. So I have been concentrating on the Canticles.
The octavo of the Magnificat is a puzzler. I doubt, if we keep the staves at 6mm., that we can keep it to 4pp. It fits to 4pp. readily with the staves at 5.5mm.
There is no rush to find a solution to the puzzle.
The performance of the Evening Service in D in its entirety may remain a once-in-a-lifetime endeavor (rather an odd thought, really).