I was checking out GGG's (http://www.generalguitargadgets.com/index.php?option=com_content&task=view&id=105&Itemid=26) and Gaussmarkov's (http://gaussmarkov.net/wordpress/circuits/brown-sound-in-a-box-ii-bsiab2/) BSIAS2 schematics, and I see that M placed D1 to ground, and added C2 to the 9v+ supply.
The original BSIAB2 schematic at GGG has D1 inline with R4/R5/C2, and it does not go to ground.
Why did M do this? Power filtering/protection?
Crap, never mind.
SORRY!