Myself,Of course l have been tempted, but l have resisted on going down the fuse rabbit hole, party the cost, and to be honest, l am happy with the sound of my set up after shielding etc.

l think John sumed it up nicely, fine tuning if your set up is lacking, on the other hand it's easy to over egg the pudding, more isn't always better. l did this years ago with some Musical Fidelity gear and pure silver cable...lesson learnt.

One cheap mod, is to apply some Graphene mixture to the contacts of your fuse and fuse holder, seems to work on any fuse.