New adventures in swaddling...

[Sanguine]

My DS (17 WO) still loves to be swaddled at night. Since he was born we used a miracle blanket and he really loved it, and has been sleeping through the night since 6 weeks old. Unfortunately, he's now outgrown it. We decided to try him in a sleeping bag for a while (swaddling's for newborns, right?) with the result that he spent the whole night startling and waking himself up and demanding food every three hours. I tried different ways of swaddling his arms, but he's a real houdini... if he feels there's even the slightest chance he can escape, he wriggles and writhes until he succeeds, then he yells, and when you go in to him he stares sweetly up at you and waves his arms as if to say "Look, I've done it!". We decided to try a swaddleaze, mainly because they actually make a larger size. When I tried it on him, he just stuck his arms out of the neck hole within about 2 seconds. Then I tried just zipping his arms into the bag with him, but then he got himself into a real mess with his elbows sticking out of the arm holes so we gave up on that one. Then at 3am the other night i had a brainwave. I put him into the swaddleaze, then I took the flap but instead of just wrapping it around his torso, I put it under his left arm, then back on itself behind him, then around his right arm, then tucked in the end under his back and attached it with the velcro. The effect is a firm swaddle with his arms by his sides that is similar to the swaddle he used to get with his miracle blanket. When I had finished, he grinned in delight and fell into a peaceful slumber. We've done it like that for the last couple of nights and been rewarded with two unbroken nights sleep!

Is it a bad idea to still be swaddling him at 4 months? will he grow out of liking it, or will we eventually have to train him out of it? Is it ok to use the swaddleaze like this, do you think?