[Slim Version] Modular Filament Holder with Magnets

This is a remix of the already great design by @DiegoBittenc_1435598

Model is now shorter and overall footprint is smaller, making it more compact, which uses less material and takes less time to print. You can still use magnets and it's backward compatible with the original design.

Use the same print instructions as the original:

2 walls, 10% infill and supports.

Check the original design here: https://www.printables.com/model/641953-modular-filament-holder-with-magnets

• Smaller footprint
• Lower height
• Less material usage
• Prints faster