Several TAS isssues ago, RH listed several cheap tweaks and among them he recommended periodically tightening the screws mounting the drivers to the front baffle. Since my Usher Audio Mini Two Diamonds were only 6-9 months old, I assumed this was a tweak I would consider after several years of use. Wrong! Last night, I was shocked to discover that almost all the screws on every driver were loose! So I tightened them. Then I listened..........WOW!!! The entire sonic picture snapped into focus. Midrange transparency, which I had previously thought was a step down from my previous speakers (Dynaudio Confidence C1s), improved substantially. Bass developed more slam and agility! Isn't this hobby fun?