Case of the Amazing 8

[pauldo]

I’m confused, don’t see a thread on the adjustment screw for holding the higher-octave string saddle in position.

Look at the D strings saddle - I see threads for the adjuster on the octave string saddle peeking out on the left of the guide rod. Once you see it, you can't unsee it.

Also, look for the adjuster ends and the anchor (locking nut) ends of the adjusters. They are visible, on opposite sides.

Yes!  Thank you.