What can we say? Every single one of these amps has its own unique sound & they often sell for thousands of dollars each in original condition. They are considered by many to represent the peak of amplifier technology; the most touch-sensitive & responsive amps ever manufactured. And talk about sustain!!!! If you are lucky enough to be the keeper of such an amp, please treat it with the respect it deserves! No need to mod it – it’s such an amazing amp that everyone else is copying it!! Just repair what is absolutely necessary, restore it to it’s intended glory & ENJOY!