There are several ways to accomplish this.
1. Use the existing body planes to create new sketches, project the edges,
and offset the loops by the thickness of your material, which by the way is
not 0.060.
2. Create disconnected sheet-metal faces from each of the offset loops.
3. Add the bends and corner treatments.
This should create a completed sheet-metal model that will unfold.
Alternative method:
Do your edits in the construction environment.
Dennis
wrote in message news:5862718@discussion.autodesk.com...
What you mean, that you remodel the new part over the old and delete the
body....
What are the steps?
Thank you for your help.