Yes I've been weighing this all up over the past couple of days. I came to the conclusion I'd rather have the ability to just easily wipe the secondary profile before going through an airport if needed and then set it back up again afterwards. Alternatively I figured I also wouldn't necessarily have to go full nuclear - and instead just wipe the apps that may peak their interest if they examine installed apps on Owner and re-download/set them afterwards. Thanks for additional advice above though re encryption. That's pretty much sealed the deal.