Any new tweaks out there?

I know we've had threads dealing with this topic but newer members may have experiences not presented thus far. For instance, I'm sure many of us have noticed the the skimpy 12-14awg leads on the power supply of our amps. Has anyone tried replacing them with say, 8awg just to see what happens? Or changing out main caps? Or changing to pure silver signal wire? Or using the solder provision instead of the hold-down nuts on binding posts on the amp-side? Or going from E-I to toroid, etc.....? It would be great to hear about something new.