I was pulled over this morning.. 26mph over in a 30mph...

If you live in MO then you can take your vehicle to a repair shop and have them "check and calibrate your speedometer" You can take the receipt for the work to court and plead no contest and show them your receipt. Claim that the speedo was defective and you didn't know until you were pulled over. Once you got popped you realized there must be a problem so you had it checked out by your mechanic. They should drop it to defective equipment.

Other option is an attorney.

I have done this both ways and they both work.