I totally agree! I love the voicing of these early Rectifiers, but I still keep my Rev Gs around because they sound so much different…so much more “Rectifier” like.
Since these early Rectos are becoming increasingly more rare, I do recall a mod that was rumored to voice the 3 channel Rectos similar to the early Revs.
Around a decade ago, fluff and I were trying to figure out if it was possible to mod a 3 channel and have it voiced closer to the early Rectifiers, and after a few years, I believe it was fluff (or maybe it was Jerry at FJA that modded fluff’s non-multi-watt 3 Channel) that came up with a convincing mod. It wasn’t the “Presence Mod”, but something more similar to a Pre-500.
I personally never tried the mod, but I do remember the clips I heard sounding very, very similar. For anyone feeling adventurous, that is dying to try an early Recto, there used to be a thread over on the “forum for beach accessories” that will guide you through the mod step-by-step