Hi Nate and the entire Esoteric Software team!
I worked in version 3.8 for a very long time, since the project was implemented specifically for this version of the API. Now switched to 4.1. A lot of new and interesting things have appeared, but here are some points that I would like to see in the next updates of the program:
1) Hot key and method of screen selection of all child bones.
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2) Advanced bone splitting feature. Fibonacci is not always a convenient option for splitting bones, since the last bone turns out to be quite short. I suggest adding a slider for the length of the split.
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3) In Edit Mesh hold alt key to switch modify mode
Thank you for your attention!