I did a twist that was horizontal and vertical along the paper. I then folded a preliminary base and sunk the region with the twist. Then I colded a crane and opened up the rose.
This is obviously not the same crane. There is more paper allocated to the region with the twist in it. I suggest trying to sink the twisted region in and out. That way, when you open up the rose at the end it will be able to rest on the bottom of it, as opposed to the top as in mine.
Try a twist that is less than a 16th. I don't know exactly what I used, but it would be too big for the way I suggested, I think it was about a 16th of the paper. It worked well for the one I made, but it you sink the rose into the crane, you will needed something smaller.