I looked up the Attron on this site, there was alot of good information on them. I think what I have is different in that the drop leg is not attached to the liquid header but goes into the top of the reciever,I will look when I go back out. If the drop leg does go into the reciever then I would not need this controler to pressurize the reciever to force the refrigerant out. Am I thinking right.