Replicator 2 Makerbot Extruder Upgrade Spring Tensioner

Recently I noticed my Replicator 2 was not feeding the filament properly even with the "free" Makerbot extruder upgrade. I performed the pinch test as the filament was feeding through and noticed that I was able to stop the filament from feeding. After many different modifications I came to realize that the spring that kept the whole thing under tension was just not providing enough tension. So I made this little thing to add some tension. Place it in the bottom notch of the extruder upgrade whe