I got in an hour ride and liked everything so far, no issues. But I do see an issue with this still being in beta and people talking about crashes mid ride. Can I still collect on my garmin just in case? That would suck to lose a multi hour ride.
It’s a good idea to do that for multiple reasons.
I have a Quarq PM and a Wahoo Kickr. I train with a CTS coach and whenever we establish training zones I always use my Quarq so I still use the Quarq as the power source and collect the data on my Garmin but the Kickr is what Zwift syncs up with.
The reason for this is the wattage on the Kickr and Quarq vary about 10 watts with the kickr being on the higher end. With enough rides on the kickr it can throw my TSS off a little, so I still use the Garmin data with the Quarq to send to my coach.
So you have two sources going to two receivers (quarq>garmin and wahoo>Zwift). I’m asking about one source going to two receivers (SRM>garmin & Zwift) for making sure I don’t lose data collection in the event of a crash.
Ah yeah, that works too. Before I got the Kickr I was using the Quarq for both Zwift and Garmin with no problems. I was mostly saying it’s a good idea to always have a backup of data when you need the data and you have the ability to have a backup 
Cause, who knows, solar flares, aliens, the nsa, computer crashes etc… =P
Ah thank you, good to know. Also I have seen mentions of people that do have crashes still have a local .fit file generated of all the data up to that point? Is this true and where is the default directory for such?
fit files get saved to the windows
documents\zwift\activities\
logs - documents\zwift\logs\
Screenshots get saved to pictures\zwift\
And the fit files will always generate in the event of a crash?
That’s been my experience so far, but it’s been a long time since I’ve experienced any crashes.
As long as it is sending Ant+ data, you can have any number of devices reading it. (The Garmin Edge only does Ant+ for power). You wouldn’t be able to have multiple devices reading from a BT signal. Good news is Kickr sends out both BT and Ant+ data.
I pair with Zwift and Garmin 500 at the same time with no issues. I use this data for my training logs, as the Zwift elevation and distance aren’t realistic. Especially when transferring to Strava.
Not that the data doesn’t go to Strava correctly, it’s just that when you switch the ride in Strava to “stationary bike”, Strava drops the GPS data, and keeps the unrealistic miles/elevation in the stats.
If your ride “crashes” you still get the .fit file in your Zwift Documents directory, don’t you?
Kind of related question. I just got a Power2max PM and have a Cycleops Powerbeam Pro (smart) trainer. Can I pair my p2m to Garmin 500 and have Zwift read the Powerbeam?
Yes. I always have the Quarq recording on the Garmin. I let Zwift or my phone app control the kickr.