A guide rail for a gantry system includes a support structure having an elongated support surface and a plate having a precision surface relative to the elongated support surface. The electrode assembly includes a housing having one portion which is removably engageable with the electrosurgical instrument and a pair of electrodes each having an electrically conductive sealing surface and an insulating substrate. Each data area has several data pages, and each data page forms a data image that has at least one reserved block pattern on the reading device. The electrolyte level within the first fluid chamber is adjusted such that the lipid layer is raised above the barrier wall and a PLB is formed through single-sided spontaneous formation from the first fluid chamber across the nanopore.