On the Control Surfaces, (Like the Elevators), should the shape taper 
from the Horizontal Stab. to the trailing edge straight, or should it 
be more tear drop, wing shaped bowing down in the middle?

Kevin,

 

Aside from the Legacy molds, plans and construction manual, remember that the horizontal stabilizer is an upside-down wing that must exert a down force (nose up) against the nose down pitching moment of the main wing (even though it is providing lift - nothing is free). 

 

Anyway, would you build a wing without camber?  Should the top side be relatively flat?  What does the bottom of the main wing look like?

 

On my wee Lancair, the elevator tapers on both sides.  I think of down elevator as reflexing the upside-down wing to reduce drag.  Of course, there are many that believe my thinking on any subject to be suspect.  I must leave now as the white coated squad is coming to administer a higher dose of anti-ADD meds and some hallucinatory suppressants with an interesting mix of mood-altering serenity-inducing herbal supplements. 

 

Grayhawk