I'm not sure - if you're willing to tolerate more gunk on the edge of the pages. say the book is cut +/- 2.5 mm - each page has .5 of print on the edges, and ea

I'm not sure - if you're willing to tolerate more gunk on the edge of the pages. say the book is cut +/- 2.5 mm - each page has .5 of print on the edges, and each page image shifted by .01 mm (or whatever is appropriate). cut the edge wherever, it'll work out. Glued edge registration needs to be super consistent though - micron accuracy. Maybe you mean the page on the binding/glue needs to be super accurate. I guess, yeah, if pages shift in binding all bets are off. So if there is a shift, or different pages expand or contract under binding differently than their neighbors, that would make it super hard. another approach might be printing right on the edge of the cut pages, let the ink diffuse into the side, then apply the gilt over that to hide the picture. Neat problem to armchair. I'm not really willing to put in the time or money or both to figure it out. So ultimately, I'll take your word.