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You can use a GPS to check the odometer on longer trip. I checked the B&B last summer on the return trip from the London Cobra Show and found it was 1/2% off. Changed the trannie gear and now it "almost" perfect.
I use an app on my cell to check speedometers.
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''Life's tough.....it's even tougher if you're stupid.'' ~ John Wayne
"Happiness Is A Belt-Fed Weapon"
life's goal should be; "to be smarter than inanimate objects"
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