This replaces the stock lever on the Tevo extruder, and replaces the pneumatic fitting that sometimes looses it's grip on the PTFE tube, the integrated clamp holds it in place firmly.
It is remixed from a Flexible filament upgrade that will help with flexible materials as well as make loading filament easier.
Use two M3 x 8mm socket head bolts and regular m3 nuts for the clamp.
Print as shown in the stl's, no supports should be needed.
Adjust the bolts so it grabs the PTFE tube tight, but not so tight that it clamps the filament inside.