What’s your vote for the most ridiculous, overpriced, and useless tweak?

and I thought I was crazy buying a $150 blue fuse!  But I could easily hear the difference and it was one I liked. I do have to admit some of the tweaks out there sound outlandish but......

Replacing the power line from the house to pole with one made of copper only from the Pima mine south of Tucson.....

Most useless, overpriced (most are overpriced) tweak would be the tweak that doesn’t work as advertised (most don’t) and that is way overpriced (most are) to boot.

@ geoffkait………………………………...

I am not speaking about any of your tweaks as they cost very little money , especially considering what most others charge.

This thread has been revealing for sure, but not about tweaks...

How about the Shun Mook disk stabilizer (record weight) made out of some exotic African hardwood. And costing around $2K!