Gear Shifter Fidget Keychain (no extra components)

Some assembly required - 
Glue piece 1 on the bottom of the main body. USE ONLY A FEW DROPS ON THE PERIMETER, do not stick to the spring. Superglue/Cyanoacrylate works fine.

Glue piece 2 onto piece 3 (There are a couple of divots to help align it). Same glueing rules apply as above.

Glue piece 2 and 3 onto the main body.

Depending on your printer or settings you might need to gently file the knobs on piece 2 to ensure the shifter clicks in place smoothly.