Here is my trident a few months later. I repotted it a cheap plastic pot (79 cents a piece). It's a shallow tray used to place your houseplants in to keep them from dripping on your floor. Aside from being flimsy, it worked great for my other maple (japanese green maple). It's in a a bonsai soil composed of red lava, I think turface, and also pine bark. When I repotted it, it had only ONE fresh (white) root, and very few additional feeder roots. It's surprising it was still alive. The old soil it came in was some sort of white, large grain size, light rock. I chopped the trunk higher than I originally planned because I was afraid the short second trunk might not get buds. So far I am right, no buds on that piece. I also chopped off the high horizontal root, which has left a large wound. When i repotted though, there are 4 or 5 nice size rotos forming a nebari, not all at the same elevation though, so some might need to come off, or some new ones grafted in the future.
Right now, I am just going to left the new leader grow and grow, and hopefully develop a nice healthy root ball.
Here are the pictures.