quite right :D I had asked if 3oc of a diffrence was ok between ends on another forum and was told it was fine, do you guys agree? yes I have loads of books and I had looked at loads of websites its how to know who is right!
Ideally you would want it a bit bigger of a difference, but f thats the best gradient you can get, I would set the temperature in the hot end to 27 deg C this will give a cooler end to go to, where if the temp was set at 30 there would be no cool end so to speak.