Nameserver Question for CDN
 

I have my nameservers at cloudns and I'm switching over to stackpathdns. But I can't really have any downtime, so I'm planning to add the 2 stackpathdns NS to my current cloudns NS. This way if a user hits the site and the stackpathdns have not resolved fully yet they will simply go through cloudns.

Once the new NS have resolved completely in a few days I'll remove cloudns.

Is this right?

It's such a simple thing but I'm driving myself nuts about it. I need more quality sleep..

If the only thing stackpath is waiting for is for the ns to be changed, you shouldn't have any downtime, change cloudns ns to the ones stackpath provided and everything should be fine. Users will continue to hit cloudns until the changes have been fully propagated