This wah-wah solo can be found on my band Artifex's latest demo - a song called "Alley cats". It is cool because it revolves around a single riff in E. Since there aren't any chord changes to rely on - the solo needs other qualities than the harmonic ones. Therefore, I focused on crazy sounding wah-wah licks, rhythmic ideas and MIGHTY SLIPPERS . Once again, this is a way to make a cool solo without relying on strong chord notes. The solo reaches it's peak with an exotic/progressive sounding phrase which I play in unison with my drummer and bass player.