Re: zephyr drawbacks?
The troubles with "vintage sound" are that the age of the materials plays a factor in how they sound today, and the recordings made back then were not exactly true, as everything in the signal path had its own influence on what went to tape/vinyl, including the tape/vinyl itself.
To pick up an unmolested 1950s electric guitar and plug it into a matching amp and call what you hear "vintage correct" is actually impossible: that's just how that particular amplifier's wiring and speaker interpret the signal coming from that exact guitar with those exact pickups and pots. While one could wind a pickup that would sound nearly identical through the same amp, what you've replicated is how it sounds today, after 60 years of aging, and not how it sounded when it was first made.
Until someone perfects commercial, mass time travel, we'll never really know how a vintage pickup/guitar/amp sounded when it was new.