I've set up it my document with a 0.125 bleed all around, as well as 0.125 gutter....
Maybe I'm over thinking this, but I just want it to be right.
You probably want to check with Lightning Source's tech support or see if they have a template.
If by gutter you mean you've added .125" to the trim so the page is now 8.625 horizontal then I don't think you want an additional inside bleed because the .125 you've added manually is acting like the bleed. So if the trim really is 8.5" x 8.5" you would leave the inside bleed to 0" like this, where I've added the .125 to the page with manual trim marks at 8.5" and 0" in the slug:
Did this work for you? I am having a similar issue, however my book has photos that spand over 2 pages. I see that it has a gutter in design but lightingsource said it needs to be white and rejected the file.
Thanks for any input!
You would think Lighting Source could build the no ink inside .125" for perfect binding into their imposition. Their file guide page 14:
tells you to build an inside blank bleed into the document. They don't want any marks, so for 6x9, your document would be 6.125 x 9 with no inside bleed and you would export using document bleeds:
For crossovers you would have to duplicate the placed art and offset it so that you don't lose the center .25":