Tuning Plug Jacks (Adjuster Knobs) used for tuning my version of the Dec 1982 Popular Mechanics Mini-Calliope.

Tips are gladly accepted and much appreciated.

Mini-Calliope Part 6 - Pipe Tuning Plugs & Jacks
https://youtu.be/4U84IxTTqpM

Knobs are designed to fit inside 1", 7/8", 3/4" & 5/8" diameter 1/16" wall thickness aluminum pipe.

The 1" & 7/8" adjuster are threaded for 5/16-18 threaded rod.

The 3/4" * 5/8" are threaded for 1/4-20 threaded rod.

The two End Knobs are threaded for 5/16-18 and 1/4-20 threaded rod.

Creality

Ender 3

No

No

0.1mm

40%