Hi,
As long as the new tree has good roots, waiting one year or three months, for me it is the same. Only the result is important.
I myself too had to leave an airlayer for a year. I was not in a hurry. The only drawback is that now my airlayer is 5' /1.5m tall .
That's a bit too tall. I like my trees to be shorter. Of course, I read, that you don't have such problems ( 5' of growth in one year) with Black Madeira .