Originally posted by Justin Rempe:
The rods are round, right? If so, then you can't just use L x W due to a round & cylindrical object. Surface Area = 2(pi r 2) + (2 pi r)* h
God, I really HATE MATH 
That's true for the ports, but not for the rods.
Yes they may be round (primaries) or half circle (secondaries), but the frontal area is not. It's a set, flat distance = the diameter x the width of the port.
