Privets seldom disappoint. This one has put on a lot of growth in just a couple of months, and I can tell by the strength of it that a slip-potting now shouldn’t cause any problem for it. But first, some design work.
Most bonsai design work is “grow and clip,” regardless of how you approach a tree. Wiring is certainly important for branch placement, but you’ll prune and pinch many more times than you’ll wire any tree. In this photo, you can see how much growth I’ve removed.
The final step before potting this tree is to bring in the profile. It’s often hard to make yourself cut a tree back as much as it needs to be, but over time you get better at making those decisions.