I am here in Beijing, yeah.  Of course, as you've alluded to, the fun is in doing it yourself.  If I get in a bind, though, it would be an exciting excursion to take a half-built electrostatic amp to 中关村 and learn some new vocab。 
  
 
  
I hope that it is not necessary, but I really appreciate the courtesy, sir.  It's nice to know that, if all else fails, someone who knows what they are doing will have a look at it.