I used to use a bimble inside a bambineo size 2 for my ds´ (4 months) night nappy but for about a month he´s been wearing disposables at night to use up the lot we bought when we went on holiday. Now they´re finished I need to use my real nappies again but have lost my stuffin´ confidence . Can´t go back to the old formula until I get a new airflow wrap (he has outgrown the old ones) but I have a load of wonderoos I can use. I´ve got it ready with the big and little insert stuck together and threw another small insert in there for good measure. Will that last approx. 12 hours do you think??