Having recently bought this turbo which is excellent in most respects, I have encountered a data error on actual mileage shown, which then affects average speed and I assume watts shown . I have compared the outputs to two separate bike computers with the same result, all other data is fine ( including current speed ) but mileage shown is 20% down on the Elite. There is nothing in the instructions regarding any calibration required for wheel size ( I am using a standard 700 c ) to address this issue. Has anyone else had this problem? If so how did you resolve it ?