In some embodiments, systems also include a reset protrusion disposed on a distal end of {HEAD ~ a flapper shaft} connected to {TAIL ~ the flapper lever} 
In some embodiments , systems also include a reset protrusion disposed on a distal end of { HEAD ~ a flapper shaft } connected to { TAIL ~ the flapper lever }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL