So, against my initial inclinations, at 4.5 months we may soon take the plunge on modified CIO just for bedtime since LO is crying 2 hours to go to sleep anyway at night. Right now, LO is in a merlin suit but he gets so hot when he cries that I worry about sleep training him while he's in it. Do you ditch the swaddle/merlin suit before, during or after sleep training? I don't think Ferber covers this question.

Thanks!