Unfortunately attachments are not very reliable - you might consider uploading to youtube or similar. (I can not access attachment from my ipad)
Sticks acrossntop of shoulders and neck can reduce head movement on body. Making the head independent eliminates it completely.
Can you have separate legs? yes. (Not exactly sure what question really is,probably clear from video i cannot see! lol!)
I added bones on the body and across the shoulders, but the body still swings. I must have done something to the settings because it didn't swing before.
Also, I believe the entire character used to fit in the stream mode, now I can't see his feet.
Here is the youtube link. it looks terrible.