Spring Enhancer/Compressor Upgrade for Minimalistic Mk8 replacement

This "Spring Enhancer" increases the amount of force your existing spring will apply onto the filament, allowing for more consistent filament feeding. It's a simple add-on to your existing "Minimalistic MK8 Replacement" by emmett.

In the original design, Thingiverse members suggested to buy the compression spring from McMaster-Carr (part # 9657K311): http://www.mcmaster.com/#9657k331/=v4n93e .

However, I could tell the spring wasn't applying enough force, and a lot of force was getting was