Should be fine, again I'd prefer to work from original scans but if you just want spines it won't be an issue.
Sorry I have no raws. Wouldn't that have just created much more work for you anyway? But yeah, just need new spines. Thanks so much! You have no idea how happy I am with your work so far!
Haha, its all good man. As for raws, its actually easier for me as all I have to fix is a bit of noise and sometimes a bit if box damage. If I'm working from someone else's cover I also have to look out for any mistakes they may have made, sloppy masking, artifacting from resizing things etc.
Always easier to start from scratch than to try and edit and repair.