Add option to keep the outer edges of the outer pages

pdfsticher works great for patching a set of pages with say 1.4cm trim for all edges.

However, sometimes the set of pages have content that are meant to be kept, on the outer edges of the outer pages at the generated page. And this has now been trimmed away, 1.4cm on all sides.

It would be so very helpful with an option to prevent this outer content from being trimmed :-)