the addition of an eap actuator 612 contained within a recess 614 in a left half shell 658 of a handle housing 654 of a handle 620 the left half shell 658 includes the closure yoke guide post 159 that slides with a horizontally elongate rectangular aperture 669 formed in a left side of the closure yoke 162 with the guide post 159 at a distal position in the aperture 669 as in fig1 when the closure yoke 162 is proximally positioned with anvil 14 open the guide post 159 projects inwardly to engage the coupling tube 131 whose proximally open cavity receives links 196 a 196 b fig1 in fig1 the eap actuator 612 is in its laterally extended inactivated state engaged within the horizontally elongate rectangular aperture 669 aft of the guide post 659 thus the closure yoke 162 is locked in its proximally retracted position in fig1 the eap actuator 612 is activated contracting to the left out of the rectangular aperture 669 in the closure yoke 162 which has been distally advanced to close the anvil 14 not shown in fig1 15 it should be appreciated that many laparoscopic or endoscopic surgical instruments include at least one movable member in the handle that may be.