3D Model Fix for Concealed Magnets

I have two mechanical parts 3D models that need some modifications. The aim is to create a space in the bottom of these models to hide larger magnets. The models were initially created in Blender and will be printed using PLA material.

Ideal Skills:
- Proficiency in Blender
- 3D modeling and modification experience
- Understanding of mechanical parts design
- Familiarity with 3D printing in PLA

Please ensure the modified models can be seamlessly printed and assembled.