Thank you, Bastiann. After some research with tech support at both companies I’ve discerned that “Wahoo ANT+ FE-C” does not yet play well with Zwift or Trainer Road, at least compared with the other Wahoo choice available in the pairing screen (“Wahoo Kickr”). And indeed, the two choices are NOT the same. Zwift tech support does not recommend the FE-C and says “Wahoo Kickr” is better, which after some trial and error I concur with. Also, in the power pairing screen I found that using the Quarq as the power source is not nearly as stable as using “Wahoo Kickr”. I was concerned that since I’ve used a Quarq for many years the Kickr would not return the same power numbers I was used to. That has not proven to be true. I recorded several workouts on my Garmin using the Quarq as it’s power source while simultaneously performing a workout on Zwift, and later Trainer Road. The power numbers are, in essence, the same across all three platforms, within 3 watts + or -. I’ve settled on using Wahoo Kickr for both Power and Trainer pairing, using the Quarq only for Cadence. This works very well and I’m satisfied I’m getting accurate numbers.