Artist book for client

I'm so lucky to occasionally get a request to make someone a one-of-a-kind book. This one, almost completed, is for a couple celebrating their 50th wedding anniversary. The husband, a true romantic, has crafted a poem from a batch of love letters the couple exchanged back in the early 1960s when they were courting. I've taken the poem and some pictures from that time (of the couple) and put them together in a flag book. As usual, I struggle with execution and waste. I have to make the book over and over (because I can't seem to measure and visualize). This is the final. It's close but I think if I could do it again (and why not?) I'd make it a lot messier. Not knowing the couple (everything's been done via email), I'm not convinced they'd like that.  I would like the structure to be as romantic as the impulse, as the lovers themselves.