hi,
personal opion here! I wouldn't introduce a swadlle now, as it was about 4 months old I was desparate to wean Jake from his!
As part of his "swaddle weaning plan" I did put his arms inside the gro bag, and this was quite effective.He generally worked them out in the night, but that was good as I wanted him to get used to it.
Also it turns out Jake is a tummy/ side sleeper, which he couldn't do while swaddled.
But saying all that, sometimes if he's over tired I still have to hold his arms still!
Liz.