Been reading a lot about this recently after discovering how some caps can sound quite different and I've been swapping them around and some getting good results with orange drops in places and mallories in other areas. The one thing i have only just recently tried is replacing the silver mica treble cap in my tonestack with ceramic and i like the result. Some say they sound smoother and that was very apparent. But i don't have any more in pf values and i've been wondering how they would sound in other areas in place of the silver micas in my amp. The preamp is a marshall sort of affair so it has a few of those treble peakers (470k/500pf) in it plus a treble bleed on the gain pot and i'm wondering if they may sound smoother with ceramics like they did in the tone stack. But mainly i have found people talking about using them in the tone stack and not anything about using them elsewhere. So i'm wondering....anyone swappped ceramics in their build for ceramics other then the treble cap in the tone stack, and if so did it offer the same sort of improvement?