Chiming in, maybe not adding much to the discussion;
I made a bunch of cable evaluations this week and reached a major improvement level but not finished quite yet. Once I hit this week's new level, I was awaiting my Purple fuse so I inserted an Audio Magic SHD beeswax I had in the parts bin and was surprised how good it "sounded". So my expectations were higher that maybe the 'fuse thing' will add improvement. Last night I received the Purple and threw it right in and it sounds slightly different but still nice given one hour of use.
I cannot use the AM SHD long term as it is a 6.8 amp rating and this piece of gear only requires a 1 amp SB or 2 amp std blow. Alfred backed me up if the 1 amp were to blow but it did not, so I'm good to go.
Logically, it makes sense that if we can get more of the electrical pulse/wave to move freely through the choke point, we should have sound that the electronics are fully capable of generating. Much like getting the 'right' cabling in place and hearing how your speakers actually play like $30k speakers instead of $5k speakers now that they are unleashed.
All good things.
I did not have any impact from a FEQ and 15 HFTs last week, but I gave it a shot. Overall, "Tweak week" turned out pretty good for me with the new cabling and fuse so I'm happy with the improvements.