I think you're a little confused, don't look at the hairs to guess harvest time, look at the trichromes. Clear trichs have high THC content, when those turn opaque some of the THC is breaking down into other cannabinoids, then they will turn a reddish amber color.

I think you did harvest that cola a bit early but that's okay cause you got more to come. I would judge by trich color along with how developed the calyx looks. As the plant ripens the hairs (I'm talking about pistils not trichs here) not only turn orange or red, but they withdraw back into the calyx and the calyxes will look swollen, the hairs will look a lot shorter.

Look at this picture of AK 47 (the pic is kinda small) from Seedsdirect:
http://www.seedsdirect.to/?page=shop...491f380f09d91&

You see how it doesn't look so hairy, more bulbousy. That's cause the calyxes are swollen and the hairs have withdrawn a bit.

peace