I forgot to rotate it and no problem with maintaining the pose... actually joints range are so great it does not matter if legs rotated or not
Well, it seems there should be some gap, but not so big, so I think that your case seems normal.
there close up in my video, and you can see the same condition there.
DX Chogokin YF-21 Guld Goa Bowman use (Macross Plus) time 4:59