Pendulum Clock Weight Extension

The weight for StevePeterson's excellent 8 day pendulum clock
( https://www.thingiverse.com/thing:3524448 ) has a weight shell designed for lead shot and fills the Z axis volume of your Prusa Mk 3.

This thing adds a little extra volume to make the clock run reliably with steel rather than lead shot. It interfaces with the bottom of the stock shell and accommodates the stock bottom cap.