DS is happily in his own room after moving from the nct bed nest at four months. He is out growing the bed nest at quite a rate! Sometimes in the morning when I'm knackered we co sleep or when he is poorly we co sleep. While the nest is there it's fine because he can't roll out of bed, it's side carred to the bed. But soon the rental period is up and it'll be going back. What can I do to safely co sleep without the nest? I've been looking at bed guards but im worried about the gap, is this a necessary worry? DS is big, I find it unlikely he'll get stuck in a small gap between mattress and bed rail but nevertheless it's a concern. Any ideas?