This is my own version of a clip for the idler of a Wade type extruder. This facilitates the opening/closing of the idler. I designed it shorter than others to not disturb the upper part of the extruder where the filament comes in and stronger because I have brute fingers. It is also shorter than others in the vertical direction to allow me see the movement of the idler's bearing, Sometimes I put some marks on the bearing with a sharpie to see its movement (in some risky prints to quickly see if filament jamms) This thing is based on http://www.thingiverse.com/thing:757804