Credit, copyright and thanks goes to Nelson Pass!

Mouting:
The best way to mount these boards is to do as steenoe did:
http://www.diyaudio.com/forums/showthread.php?postid=1170458#post1170458

Place the row of transistors approximately 1/3 from the bottom of the heatsink 
to get the best heat distribution.


Not enough bias current?
I had problems adjusting he source resistor voltage to more than 80mV so
I lowered the value of R9 to 5.49k, which did the trick. Just try
something between 5k-10k if you have similar problems.


Happy building and listening!

Christian Viller