I will never run a Firecore distributor again. The first one I had I thought worked great but after traveling to a track 8 hours away the car started acting up. Sometimes it would misfire and other times not and I lost a race because of it. Could not find the issue at the track so checked it over when I got home. After a few hours I see the little screws on the side of the dizzy loose and finally look inside and below the plate its a mess. Took it to Rick and he took it apart and said there were some issues with the early ones and the plastic guides were breaking. The problem was supposedly fixed and he gave me a new one. Guess what? It could not have been 4 races later and the same thing happened - no more for me MSD and no issues since!