yes you can add these saves to the SDM, i can't say how good they were.
Thank you ! Users giving permission for sharing their saves are very rare (I got a collection of extra saves in my mailbox, but still waiting for their owners to write me OK so that I can share them publicly ...), so this is very appreciated !
I still need to guess the data structure of these saves (looks like raw format with block headers ?), but after this step, saves shall be available for import on Saturn from Save Data Manager