I finally have a Vatanai wrap. I justified it as a birthday present for J. He is happy with that. J has not been very happy this week even cranky and screaming a lot. So I have been taking the opportunity to carry him more around the house.
I have found it much easier to deal with than the Didymos, probably due to the weight and length.
I even managed to get J on my back though I needed help to tie it.