How to use my Fenix and the tacx software?

Hi,

got my tacx flow today and I have to say: amazing. Smooth setup, exciting first trips, works like a charm.

I use the iOS tacx app and the synch to Garmin connect after the training works seamless.

Now I would like to use my Fenix watch to display some more metrics than the tacx app during the ride.

how does that work best? Shall I connect the Trainer to the watch and start 2 trainings? one with tacx on the Tablet and one on my watch? I guess I would have to delete the training recorded by the Fenix afterwords.

how do you do that?