I'm gonna try trimming my chains when I get back. I don't think they'll break, and I have a hunch the motor stops reeling at the first sign of resistance. I'll be sure to let you know.
I bought only one binder and I too thought they could hold more issues than 15. After that, I decided it was a waste of cash, so I stopped looking for them.
For anyone else who has completed the Yamato, did you have a resulting gap between the AAA gun deck and the rest of hull panels beneath it? It's the biggest complaint I have about the kit.