>>384903968
>when the mmd has already a bunch of twist bones, is the small guide from before the only thing I need to do to thoses?
if the MMD already has twist bones you only need to do the Unity part. the blender part doesn't have to be done.
>so would this be good settings for the fixing part?
with MMD's, yes. you should tick "Fix MMD twist bones" though.
>There is still the option to keep end bones though.
don't use end bones. you don't need them, and if you do, you can make them manually.