My second hand eBay one arrived today, I was pretty amazed at how much material they are!! I'm a bit concerned though, in ALL the you tube videos they tie a knot at the front. I know I'm a bit rounder across the middle at the moment, but when I tried it, there was nowhere near enough to be able to tie at the front!! Neither could my OH who is as skinny as a rake?? Does it need to be tighter perhaps? What's anyone else's experience? I'm petrified of putting baby in it if I can't get it right, I don't want to drop him/her!!