As I've mentioned in the big V5 owners thread, I did the bright cap mod on a V5 Infinium. And undid it. The amp does get brighter, but not when the volume is dimed, so I found it not very useful. Also it's hard to dial in a tone when there's effectively three knobs that control the tone. The other mods are too hard for me to do on the Infinium, since the components are so tiny. A speaker swap did do wonders though, with a Jensen C8R the amp is bright enough for me. Although a bit harsh when overdriven. Maybe it will get smoother when the speaker is broken in. I also like the Joyo/Harley Benton American Sound in combination with this amp.