Manually calibrate the FootPod/RunPod

Dear runners,

Who else would like to see the option of manual calibration from the FooPod/RunPod?

I calibrated multiple times with the tool in various conditions e.g. after warm-up, before/after workout.
The Pod is every time approx +/- 5% off.

On my Garmin device i can set a calibration factor manually, which is working great.