Hello,
I also made a dual mono LM3875 based GC clone but with improved (regulated) power supply.
Find attached some photos about it. I used resistor brands suggested by Peter Daniel in the most important places and some AudioNote silver wires plus Shinkoh resistor for the voltage divider suggested by my friend as my Kondo M7 clone tube preamp has high amplification.
I am not an expert but I will be glad to answer any questions (if I know the answer :-))
Regards,
László
https://dl.dropbox.com/u/22181492/GC/Gaincard_001.jpg
https://dl.dropbox.com/u/22181492/GC/Gaincard_002.jpg
https://dl.dropbox.com/u/22181492/GC/Gaincard_004.jpg
https://dl.dropbox.com/u/22181492/GC/P003.JPG