When repotting this time around on the 17th March 2017 I screwed the board and also used galvanised nails to organise the root spread:
And then into the ground:
Picture taken 3rd November 2016:
I I repotted this today. Cut the roots back from last years airlayer so it was flat, cut the stub back and screwed a small board to the underside of this tree. Plan is to sort the roots before ground growing.