It's been a few months so I thought I'd post an update, along with some questions about styling.
The tree has been growing like crazy. I typically remove the flowers so that the tree sends all of its energy to growth, but it does flower quite a bit! I think the final design will be covered in those beautiful purple flowers. I keep wiring branches for movement, thinning out bad branches, shortening good branches to encourage ramification, etc. This tree has a long way to go, but it's a lot of fun and I think it has good potential. Those nice roots that I posted at the beginning of this thread are still there, just hidden under pumice/lava rock for now. When I repot the tree in the late spring I'll expose those roots.
Here's a picture of the canopy just this morning. It needs a trim again, but the branches are getting really full, lots of ramification, and whenever I thin it out a bit I get lots of new growth from the trunk.
Question: How should I shape the canopy? How large should that canopy be if I want it to scale well with the trunk? Since I believe it will be easy to shape this tree, I'd like the 'finished' canopy to not just be circular. I was thinking about maybe keeping the top growth somewhat tight, but allowing the side branches to extend pretty far outward to give it a shorter/wider canopy. Thoughts? What would you do with it if it were your tree?
Here's a picture of the pot I plan on using in the late spring. It's a large mica bonsai pot from Wigert's Bonsai Nursery in Florida. It's hard to tell scale, but the mica pot is significantly smaller than the black tray that the tree is in right now. It's a huge pot, but I didn't want to do an extreme root reduction for the first repot.
Any thoughts or suggestions would be appreciated!