tommylion,
I'm simply adding my own view: that I'm unconvinced that fuses make the type of sonic differences ascribed to them in the OP. I had been asked to elaborate on my stance early on, which is what I've been doing: explaining why I personally am skeptical.
We all have views on various aspects of high end audio.
If seems that if one's opinion is "X tweak makes an obvious sonic difference" then that is essentially greeted with open arms.
But if someone explains why he is skeptical, then that is taken as an affront to the experience of everyone who believes he hears a difference, and so all these emotional, castigating replies tend to follow.
But the cautions I've alluded to shouldn't be seen as an emotional affront by a reasonable person, no more than if you were to take part in a scientific study it would be a personal insult for there to be experimental controls for bias. It's just acknowledging we can all be fallible.
I remember back in the 90's on the audio discussion groups, I reported what I felt were obvious differences between some CD players. When it was suggested that these differences could be due to bias effects, I didn't get all huffy, calling people "psuedo skeptics" and "negative nellies" and "I don't have to listen to anyone telling me I don't hear what I KNOW I hear!"
Instead I just said "Yeah, fair enough, could be." And I sought advice on how to properly blind test them, did the tests and...came out positive for sonic differences.
And then I've done tests on other items that did not support there being a detectable sonic difference. No biggie. And it's saved me money along the way.
I haven't argued at all for anyone else that they have to do this.
But I have to say I'm intrigued by the question of these tweaks not only on the level of the tweak itself, in this case fuses, but on the level of the type of critical thinking and reasoned discourse that does, and often does not, happen among the audiophile community.
Maybe it's a hopeless effort trying to show why skepticism is reasonable, and why questioning our own subjective inferences is actually a good thing, not a personal insult. But I think it's worth at least trying to get this point across sometimes.