Bulldog XL Extruder Pinch Release

This is a fitting for the RepRapDiscount Bulldog XL Extruder that snaps on and releases the pinch on the filament, allowing for easier filament changes. I must say that my grip strength has improved since I started using the Bulldog XL, but this device aims to prevent me from having sore hands.

Seems to work well with 1.5mm walls and 50% infill.