@elevario: your aero chain ring has a little cut out where the battery compartment is on the compact version. On Rotor Q-Rings the chain ring needs to be modified a bit to fit. Readings are not affected by chain rings, our power meters are built so you can change chain rings without affecting calibration, so you rest assured.
@Beanster: that's right, our new Type S (http://www.power2max.de/...ca/power2max-type-s/) is the one for you. Unfortunately the Cannondale doesn't fit with the existing model. Type S will ship from the beginning of February.
Happy training to all,
official power meter of Movistar Team