wanted - .bag file with left and right encoder ticks

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Hi,

I'm having trouble getting my odometry code to give me anything like the correct information from my robot. i'm 90% sure my equations are correct, however i'm having trouble nailing down the route cause.

Does anybody have a bag file of a robot with wheel encoders, and the relevant dimension info etc handy, as well as an image or something of the correct path? Just to help me figure out where the problem is.

Cheers