User has a rectangular pocket with blended corners in a solid, and wants to
extract this pocket as a new solid. How can this be done?
1. Switch to the idealized part and wave-link this body. Toggle ON 'Hide
2. Then, select 'Insert -> Synchronous Modeling -> Delete face' command. Set
the 'Smart Selection Method' to 'Boss or Pocket Faces' and pick a face in the
pocket feature. This should select all of the pocket faces.
3. Now, select 'All but selected' button (from the selection toolbar) and then
select OK to this dialog. If this button is missing, then you can add it by
selecting 'Tools - Customize', switch to the 'Commands' tab, select 'All but
selected' icon on the right (scroll down to see it) and then drag and drop it
in this toolbar.
This should extract this as a new body.