I've purposefully kept out of the blame game between luthier and courier, so can't fill in any details.
I replaced the Aquila strings one to six with Savarez Red Card, hard tension, but tuned down a semitone, and the sound really blossomed, louder, and with a beautiful singing quality. I'll no doubt, as is my way, keep experimenting for a while, between string types and tensions. This is a very subjective area, or course. I'll see if I can make a video today, probably restricted to the first six strings as I haven't had time to explore the Yepes tuning yet.