Here is a Quick Release Lever for the Airtripper Bowden Extruder. For filament release and tension on the Airtripper Bowden Extruder use this lever to make quick access easy. This is designed for using with a petrol hose for spring tension on the pressure bearing. But, can be adapted to use with springs if you make a pivot rod. See Instructions for suggestions. Directions: Springs? A suggestion to those using springs - Use a wood dowel or similar for a pivot rod. The pivot hole diameter of the Lever is approximately 13mm/.512". You will need bolts approximately 50mm/2" in length. These submissions were inspiration used as design aides.: