6 model

Free

Expandable Spool Rack

Thingiverse

Free

Twister (expandable MK8 nozzle box)

Thingiverse

Free

Better Expandable/Modular Magazine Rack (AR/AK)

Thingiverse

Free

Ultimate 18650 Power Bank with Infinitely Expandable Capacity

Thingiverse

Free

Extendable Dagger

Thingiverse

Free

Middle finger attachment for the extendable pointer finger

Thingiverse