Here again is an example of how I block out the weighting on the head.
Now once you get to the arm, we want to test out positions on those as well. But we built IK onto those arms, and I bet those IK handles don’t have clean translate values yet. And if you try to freeze transformations on them, they don’t change. As well, when you rotate the COG the arms and feet float with the body.
The easy fix here is to group the IK handles. After that you should be able to freeze transforms on them, as well as they will stick in space. If you do want the arms and legs to stick with the COG, you can always parent the groups under the COG.