DS is now 15 days old and having been weighed today he's now big enough for the gro bag we have. Just a bit confused about feet to foot with it - his feet will be miles from the end of the bag so will be loads of excess if I put his feet at foot of bed nest. Or is this just for blankets as guess he can't wriggle down in bag anyway? Any advice/experience gratefully received - or should we just continue with blankets a while longer?