I've told Kurt already that the problem with Cardone units has just started a couple years ago. His was bought 7 years ago! The Richporter is brand spanking new, has no core charge and is cheaper than the Cardone unit. What's there to think about? lol
Cardones nowadays are junk! I've been there, done that and I've read numerous threads where people bought one, installed it and THOUGHT the dizzy wasn't their problem. I told some of them to take back the reman'd Cardone unit and buy the Richporter and it fixed them right up! Feel free to search for the threads where I recommended these to people with success!