I usually install beta software on my phone and iPad but there are a few apps that I need to work 100%. The most important one is the app for my DJI drone. Can't have an issue with that while I'm flying. I've read reports that the app currently isn't planing nice with the new operating system. I have a spare iPad Air 2 that I'd like to test iOS11 on. Would it be better to set up a separate iCloud account then register that with the Beta program? That way there wouldn't be any issues that might cross over to my other devices? Or, would I have no worries running the new operating system on one iPad and 10.3.3 on everything else? I think a drawback to having everything separate is I'd have no real reason to use it. No need to check messages, texts, emails or anything else because it wouldn't be linked to my regular account.