The method 40, further comprising placing {TAIL ~ at least a third gate chamber} in fluidic communication with {HEAD ~ the entrance chamber} and a third egress channel in fluidic communication with the third gate chamber 
The method 40 , further comprising placing { TAIL ~ at least a third gate chamber } in fluidic communication with { HEAD ~ the entrance chamber } and a third egress channel in fluidic communication with the third gate chamber
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH