Kainen, you might want to consider whether your juniper is really the size and girth you want it to be. If you start styling and keeping it in the smaller pot, it will not grow a whole lot...which is fine if you're pleased. But if you would like a tree with a bigger trunk, and with more branches to work with, consider getting it back into the ground or a growing box or something that will give it a better chance to develop its own personality.
The hardest thing is growing a good trunk, which gives the illusion of a real tree. It takes years if you want to do it for the trees full potential. But in the end it is very rewarding, giving you a tree that is impressive and distinctive.
If you are interested in looking into this way of growing a bonsai, go to the Tips and Techniques forum and look for the "All you need to know" series that Will has lately done, which are compliations of posts about groups of knowledge. (You may know this but perhaps someone else doesn't
) The articles on growing a nice thick trunk are there, and are worth considering.
Nice healthy tree, and you've done a great job keeping it that way!
Joanie