yeah,that's the problem of feast because it tests only a few skills.
maybe you are very good in the feast test,but you are not good in differentiate between left and right, than you will have big problems during training because it's so important for center controllers!
i am very sure that i will pass the training because i passed all tests in germany(but failed in the interview),passed all tests to become a military pilot and i passed the psychomotric tests for the lufthansa,but i still need an employment contract
i hope eurocontrol is my future.