I always ran P3 plugs in my PTM 5 port. But I have just seen another guy who runs the 7 port and the 3 port tht swears bu the Odonnel plugs. I was looking around on the net and noticed that the OD plugs are 1/2 the price of the OS plugs. Which OD plug would you run in the 5 port? I am going to give them a try. But I know I have used the same OS plug for up to 4-5 weekends of racing.