we recently put our 27mth ds and our 6mth dd in together.
It is still a work in progress but it majorly helps that dd can self soothe.
I would recommend sarting it on a weekend, or anytime when you will have more than just yourself to get through the night and the next day, incase they don't sleep well due to the change.
We are simply winging it day by day, for some reason the afternoon nap seems to be easier to deal with than bedtime!! not sure on the reason, but we will get that figured out.
Good luck, try on the now there's 2 under 2 board, they may have some more advise there.
