I read the first post. I did not found anything new cos I already knew that.
Mew asked: "How is the l2 probability calculated?" I don't know the answer, but it could be posible to disASM a l2server to see how the enchant process is done. Am I right?
And one more thing I want to say. The random is not really random, you can predict what a rand fucntion will thow, if you know the previous results/time. But when you OE anything, do you know what was the last item that OE? How many time has passed? What was the result?
So, i agree that the OE in not trully random, but for the client side, it is.