A step extension for a stirrup is comprised of a top plate for attaching on top of a step member of the stirrup, and a bottom plate for attaching to the bottom of the step member. The size of the suction face of the suction nozzle is set so as to be larger than the relevant chip component. Initial estimates of the position of the AC andor PC are derived from the identified structures. An N-way low-band device includes a first low-band device port coupled to the third front-end interface port and N-second low band ports. The device includes a loop hinge that hinges by twisting a body of the loop hinge.