Here is a pic of the 1st tree from 2 sides with some blue markings for the layer position i am thinking and the red lines are for the secondary chops to get a trunk line i am after. In the 1st pic there are 2 possible seasons of layering marked as 1 & 2.
The second pic from the opposite side of the tree shows i could possibly create one large tree with good size and air-layer it off the graft. The question i have with this, if i then chop of the very substancial forked branch, will this scar heal over enough to give me a good finished product over time or should i be looking to air-layer straight sections only, plant them in the ground/pot then chop these from time to time to develop the trunk flow rather than air-layer in a trunk that already has flow as in the pics?
My 2y/o daughter saw me using chalk to draw possible air-layer positions and thought she would help out with it

btw the tree is a Japanese Maple and the bottom trunk size is about 90mm diameter from memory.