Sol, Have you really tried this? I couldn't get straight
edges without distortion. Sloppy seams! I have since figured
out that it is far easier and cleaner to split the corners on
Bruce…Yes, I’ve done this many times. It is not my
invention, but a classic Silversmithing technique. I use it not
only for box covers but also for any piece that is domed
(spherical or other ) when I intend the open back to be flat
(as a pendant for example ). In the case of a box cover, small
edge distortions are not critical because they cn be pulled into
shape with binding wire when you solder the top to the box. There
is no reason for sloppy seams.
I wish I could visualize what you are describing by splitting
the corners on arcs.