Thank's for the link, it is nice tutorial, but seems many steps are missing:
1. How to correct set up hover hierarchy?
2. How to correct add animation to it?
3. Is there all parts need to be animated, or just moving ones?
4. Is there all animated parts need to be merged in single "body" model, or they may be set up as children of animated bones?
5. Is there bone_root, also need to be enveloped with other msh parts, and is it also need to have keyframe?
6. If I set merged animated body parts, as children of the Dummyroot, and parent of bone_root (I take a look on stock rep_hover _fightertank as example), how I may export animation? If I delete it, it ruins hierarchy, but I if export with it, my _9pose.msh will be huge, and much bigger, then stock rep_fightertank_9pose.msh. I supposed, for animations may be needed only bones anyway...
7. How to delete keyframes? Seems for export basepose.msh, I need to delete all keyframes, except "4". I found options, named "Ripple". When it checked, I can delete keyframes, by clicking on Key button, but I can't delete number "0" anyway... Also, am I need to delete keyframes, from all of the bones, or just from bone_root?
Perhaps, I cud post much more questions, if previous ones cud be solved...