Thank you, Javi, for posting so quickly - it exposed a mistake in my sketch/description. The center of the station is enclosed, the hollow core is completely enclosed, (there's much more going on inside.)

What are the dimensions of the book?

I may be stuck with a 5x8, if I do any resizing it will be to shrink it to 4x7.

Thanks for the invite. Kindly review my entries front / back cover of the book and give feedback.

It's a good rule and best behaviour to give feedback, good or bad.
Thank you

Any feedback please ?

Thank you all for your submissions.