Hộp replica KL-1 Circular Slide Rule (КЛ-1)

The typical KL-1 Soviet-era slide rule is nowadays often sold  to collectors in a paper box rather than the bespoke, КЛ-1 branded circular box. I created a replica to carry the slide rules in my collection, an I'll be happy to hear from others who find it useful. I made the replica as close as possible, except the central bulge in the bottom is a little flatter to simplify printing bottom-down.

The attached 3mf file shows how I print it, although I dare say my method could be improved upon.