Hi Boon,
I included a quarter from travels to the US, so yes same size.

I too was thinking shohin.
Maybe something like the attached picture? what do you think?
I do have room to grow in the ground, so the airlayering sounds like a great idea.
Do you mean that i should plant this in the ground or just the ones that i layer off?
I have started to grow in 'Boon mix' so this one will be getting repotted in spring, just back into the same pot.
Also how important do you think nebari is on shimpaku, should one bother looking for a good nebari or does it not really matter.
Thanks for you input.
Scott.