Angier,
The counter weight still needs to 'hang low' for an overbalanced condition.  It doesn't matter if the elevator is right side up or up side down.  BTW, the 3/4" low equilibrium point is also a function of the vertical offset of the CG to the hinge line.  If your hinge line were exactly through the center and the part symmetric top to bottom, any overbalance will cause the elevator to rotate into a vertical position.  The CG of the aileron hangs well below the hinge and can therefore be easily trimmed to have a specific deflection off horizontal.  You should balance to level and then add some measured guess for the paint.  Be generous.  The paint, although light in terms of oz/ft^2 , has a big moment arm advantage.
Chris Zavatson
N91CZ
360std