The only direction that matters were the directions from Peter Aczel that fuses degrade sound.
No matter what direction a Hifi fuse arrow is pointing to, the sound will still be better than a stock fuse.
I have usually bypassed all fuses in the past(bad, I know, but the sound was better)since I first read, and then more importantly "tried" bypassing speaker fuses.
If no one has tried an upgraded fuse how can what they say about it be taken as anything more than just speculation?
Put your trust in those who have tried the product and found it works,then scrimp and save and come up with the chump change it costs to buy one and then post your discoveries.
Really,some folks never bat an eye when it comes to rolling "NOS" tubes, and they aren't chump change.
Yes, I know, tubes do sound different,only because enough people have tried tube rolling has this practise become acceptable.
There was a day when the purists said this was a futile waste of money.As long as the tube specs out,what more do you want?
I was there when most of the audio know it alls, also said tubes were obsolete, and transistors were the superior amplication devices.
They even had the specs to prove it!
Well we know where tubes and good old analog based systems rank today.
Gear deligated to the dumpster a few years ago is back at the top of the food chain and in high demand and well respected.And priced from cheap to exotic.
So if you must, listen to the folks who scoff at upgraded fuses, and toss out your tube gear and turntables while your at it.It's inferior junk, snake oil.
No one's going to laugh at you then will they?