I am using a Stages single sided power meter with the bike on a Kickr. The Kickr is being controlled by the Wahoo app and I record the workout on it as well as on a Garmin 530 head. The Wahoo and the Garmin are both paired and using the data from the Stages PM but they are not in agreement. Yesterday I was doing a workout that had a 5 min threshold set and there was an 13 watt difference between the two. With the Wahoo reading higher than the Garmin. In the past I have attributed this to the Garmin suffering from PM dropouts.