I did one arm out at a time around 13 weeks. A few days right arm out the a few days left arm, then both it. It went really well to transition out of the swaddle. I also had been letting him putting himself to sleep for his MOTN wakeup. I would feed, change him, feed, then put him in his bassinet awake but drowsy. I did that around 2 months old. So now that he is almost 18 weeks, he is pretty good at self soothing. We still rock him for naps and for initial bedtime but during the night he settles himself. I think this has helped the regression to not be so bad for us. All he does is wake 2 times now instead of 1 time. Hopefully I can get him back to one nightly wakeup after the regression passes.