So I finally joined the local bonsai club and went on a dig - found this charmer. It grew on a rock surface so it was easy to get up but it didn't have a lot of roots.
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Still in ground.
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I liked the balance of foliage.
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And the main feature.
I started out with a plastic training pot, but it broke mid-potting...

So I swore off plastic and built a wooden box instead.
The grow box is about 43 cm wide and the tree trunk is about 3 cm.
It's in 100% pumice with quite a lot of its original soil around the roots.
Almost a month later it has buds, but not gangbusters - the plan is to wait and see how they develop before I start fert. Trying to follow Ryan Neil's yamadori Pine knowledge.
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