lennard wrote:It is normal for thicker Ficus cuttings to grow roots out the callus formed by wounding the tree instead of the side of the trunk- I believe its "easier" for the tree to do so. (But scientifically it has something to do with auxins.)Mitchell wrote:
I would love to hear from our experts on their opinions and suggestions, particulary if you would have some suggestion to fix the roots.
No expert here but there is no reason for growing new roots higher up on the trunk. For the thickness of the trunks you have you will also want to end up with a few thick roots to make up the nebari. If I were you I would select seven to nine strong roots and cut of the rest (the area between the chosen roots can also be cut into an upside down V) to help build those seven to nine roots. This will have to be done a few times because the cut roots will grow again.
The other way you could go is to let the current roots grow a little stronger and then bundle them into seven to nine groups to let them fuse over time.
This kind of cuttings give you nice fat trunks but working them into believable bonsai is going to take a lot of creativity and time.
Here is one "exactly" the same that Im working on:
Lennard
I was under the impression a nebari should start from the side of the plant, not underneath. I may just be not following.

I am not concerned though in establishing roots so much, more-so how to grade / blend the trunk with the current roots.
There are plenty there and your bundling method sounds good for making them more prominent.
The "lip" is what screams cutting to me. Perhaps taking a chisel very carefully and removing the lip section above the selected roots, would give the the illusion of coming from the trunks side.