Speeding Ticket #2, NEED HELP ON THIS ONE... Options

[JoKeRkId613]

Here's the situation: 67MPH on a 40MPH 2-lane one-way street. The cop was pointing a radar gun straight at me. He was real cool. He told me he'll give me a break. He didn't give me a ticket for wreckless driving, not having a seatbelt, illegal tints. Thank God. But I have an unlawful speed ticket to worry about. I just got a ticket about 2 months ago for the same thing. 60MPH on a 35MPH. Except this time, the cop WILL be in court and he said he has all his certs and everything for the radar gun. I told him I didn't realize how fast I was going because my cluster right now only reads in km/h since my original one was messed up and i'm fixing it. i don't know if that'll help me. He said he usually always wins the case and that he will again this time. So I'm saying I plead no contest and say I didn't know how fast I was going but it didn't feel like I was doing 67. My cluster only reads in km/h so I think that should help me out a bit. What do you guys think? Any help would be greatly appreciated.