Seek out the semi-hostile fowards Pacific Rim tuners Stereophile review.
Disinformation B.S. is rampant in some of those responses, but seeking out the review would be a good FIRST step to separating the crap from actual FACTS.
The F-93 Elite isn’t (and never WAS) part of an $800.00 rack system. (Lie #1.)
From there, there is quite a bit of room for discussion about why the sending end of the equation (along with all manner of EM/RF/Solar activity influenced hijinks and last and most of all the "WETWARE" misaligned of participants/listeners or more accurately perhaps the hopelessly biased) about why subtle differences in tuners don’t really amount to much. I’m not in that camp, but it’s a justifiable assertion.
Yes, it absolutely DID smoke the Day-Sequerra in RF sensitivity, in both Stereo and Mono. Why do you think so many domestic tuner manufacturer’s reps lined up all the negatively biased reviews they could AGAINST it? (It was a coordinated effort. Connect the review dots.)
I absolutely advocate for giving away tube tuners. (If sarcasm/cynicism is going to be the coin of this realm...) They’re not stomp box preloaded, distorted guitar amps, where I believe tubes make a positive difference. They’re midrange bloated and dynamically compressed devices that everyone who loves them has every right to love, irrespective of how they sound. You should seek out the F-93 ELITE. Just don’t conflate it with other tuners with similar model numbers from much later-those WERE never sold as free-standing components. (Details should, but apparently don’t, matter for those who insist on being bereft of them.) Then have a truly GREAT day! That’d be a great way to start one.