My son is 26 months old. We started potty training a few months ago but this was before I read your new book which I love. I want to try the N75 method because he is basically choosing to go in his pull up when he wants and to the potty when he wants. But I was wondering if we should convert his bed to a toddler bed first before I start the new trainging (including the night time couching). Is that too many changes at once or an unnessasary change for the potty training process?