Compared to the Cauldron, the Conversion Crucible has no hitbox on its bottom surface, and the hitbox of its legs protrudes inward.

Issues:

1. The Cauldron does not allow item entity and small projectiles to pass through from directly above, but the Conversion Crucible does. However, players do not pass through due to the excessively large hitbox of the legs.

2. When trying to break the Conversion Crucible from directly above/below, it destroys the block directly below/above it.