Composite-ARF Impact question

[Adam Quennoz]

Earlier this year I got to see a CA Impact up close.  It was the 
pre-painted version.  The owner pointed out that something didn't look 
right about the vertical stab.  I took a look at it from the nose.  It 
seemed like it was twisted.  After a closer look from above I could 
clearly see what looked like a non-symmetrical airfoil shape. The 
parting line wasn't centered.  I dismissed it as a possible 
manufacturing error because I've never heard of anyone designing a 
vertical stab that way.  Well, I just received my Impact (white/red) and 
it too has the non-symmetrical airfoil v. stab too.  It seems as if it 
was designed to create lift to push the nose right as if it were 
assisting the right thrust offset.  I'm curious if anyone out there 
builds their pattern planes with this feature or is this unique to this 
design?

Thanks,
Adam Q
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