Here is an old post I created about this regulator:
http://www.rcuniverse.com/forum/m_64...tm.htm#7088648
It should answer your questions. I also published an article talking about this in RCJI isuue 90 ( June/July 2008 )

Check the temperature precisely with a infrared thermometer.
Note that the new blue heatsinks are getting a little bit hotter due to the fact that they evacuate less heat ( blue color )