Etkin is a std text on S&C (Dynamics of Flight - Stability And Control), Bernard Etkin
It worth referring to, but doesn't give a specific solution for all moving tails
This book on the web has most pages readable and does touch on the subject
http://books.google.com/books?id=D-c...sec=frontcover
The mass-balance and flutter solutions are distinct but very close to each other... pretty close the hinge point I'd say, and the hinge-point close to the a.c .
c.g. slightly ahead if anything IMHO