hey cj, thanks for posting that dissection.
while we're on the topic of small amps...
PRR's third watt 6au6 design was already posted, but here's the thread from the hoffman forums where someone is building it (midway down):
http://www.el34world.com/Forum/yabb2/YaBB.pl?num=1192851160
adam alpern (who i think has posted here before) has a page with lots of info and links to amps built with submini tubes:
http://amps.zugster.net/projects/subminiature
those laudable JLM chaps down under also have a SMPS powered mini champ:
http://www.jlmaudio.com/user/viewtopic.php?t=19