My biggest Ficus benjamina

I think your ficus could really benefit from root training. Not just combing them out straight as you have done, but actually bending and pinning the roots in place so that there is some overlap, some waviness. If you do internet searches on root trained adenium you will see what I mean. Or if you can't find photos I can look some up for you. It's far more natural looking for the roots to have bends and kinks, fork, sometimes overlap one another and when this is done carefully, they can be as beautiful or even more beautiful than the branches you are also wiring. Instead of using wire though, root training of that nature is usually done by pinning individual roots painstakingly into place using florist's pins or thin pieces of bamboo kabobs. I'm not sure if I am allowed to grab any examples off of the internet and post them here when they aren't my photos of my own trees but I can PM some perhaps. I realize you want these to fuse together over time to build you up a nice nebari but the individual root shapes are going to linger for years and years - so you may want to carefully arrange them for more interest and movement now, before they are set. Convenient to work on when you do that repotting.

I am working on training three ficus at the moment myself. All of them smaller than yours but also variegated. I'm not usually a fan of variegated foliage on bonsai but I happen to have all these rooted cuttings so I thought I would play with them. Like you, I am working on fusing several trunks together for my larger plant, and two smaller ones are destined to be more cascades. With good care they sure can grow fast and love being outside in my summer heat and humidity.

Yes Hyn, I agree. Overall this thing suffers from lack of planning ahead. Seems to me the development has speeded up considerably. Has to take new pictures.

Goal I have in mind is "Chinese" in a very loose, if not false, sense. Upper part will look like a meteorite. I have been hoping for trunk base and surface roots to largely cover the pot. Base is asymmetric in a way I like. Bottom would be very stable, top moving fast. We will see if that is just silly. For now that IS the plan. I have been thinking of directing the roots more like top.

Thank you very much for commenting, and sorry the delay in answering.

Jan