I 'm considering of getting a Quarq PM, but still not sure about calibration. My friend who is using SRM found a way to calibrate it himself with adding weight to calibrate the stain guage. I found that Quarq also able to do that but can't find the device to set it. Found some forum talking about doing through ANT+ divice for PC and a software, can this be confirmed. Also, how and where to get it.