When I think of crazy tweaks I always think of “The Crazy Little Clock”.
I think the company that made that is still up to no good.
However, these days, I have been turned on to super valuable tweaks by participating in this Forum. All have turned out to give major and significant improvements to my system. Most have proven to be transformative.
QSA Yellow fuses, SRA platforms, NPS 1260, and most of all, Townshend Podiums. I can honestly say that the improvement with the Podiums is as significant or more than any component upgrade. Perhaps only surpassed by my speaker upgrade itself.