My system is currently hidden away from the builders, but when I get it back up and refamiliarise myself with it, I plan to install an EQ63 from One-Thing-Audio in place of the standard cap and resistor in my Quad63s. I might as well take the opportunity to replace the existing binding posts, but am not sure what would be best as a replacement (at a real world price) The standard fare seems to be gold- (or rhodium-) plated brass of various designs, but I've also seen bronze and "red copper". Copper seems a good idea, but is likely to tarnish quickly if unplated and I've not seen plated copper. There is also the option of Eichmann sockets or WBT next gen. Any thoughts would be most welcome- especially if based on experience :) NB Also posted on the Wam so apologies if you are reading this twice