(Continued from part one)

Using the jigs
Before all the "pages" are securely attached to the four cords, they need to be propped up. The jigs keep each of the pages in place, while they also provide a relatively sturdy structure when the cords are pulled taut.

Securing pages onto cords
Once the cotton cords were pulled taut through the pages, I applied a tiny drop of PVA glue onto each of the joints. A squeeze bottle with a tiny tip worked great for this.

When dried, the PVA prevents the pages from shifting on the cords, so as to maintain even spacings between them. Supports at the front and back of the train worked with the jigs to keep the structure upright. Once the PVA dried, the structure became pretty sturdy and can now stand on itself.

By the way, that's my trusted HP-22S scientific calculator in the second picture. I had it since high school, it's been 20+ years and it's still working great.

(To be continued.)