I ran with the Control D servers for a while, 76.76.2.2 and 76.76.10.2. That's supposed to be the ad blocking version. With suffix being cached, and less times etc I'm not quite clear when they came into effect. But this morning YouTube won't work, it detect an ad blocker and thee seems to be no way around that. My tablet doesn't have a way to set DNS manually so not easy to do a quick test or over-ride. So back to Open DNS for the moment.
Will have to do some testing from the laptop.