Included in an overhaul restoration is a thorough cleaning, demagnetizing, relubrication and much more.  We clean and relubricate the controls, switches and plug-in contacts. The heads, axels, shafts and bronze bearings are relapped, polished, resurfaced or replaced as necessary along with other worn, defective and known to fail parts.  Only original replacement parts or an improved version are installed including washers, springs, bushings, lamps and other parts not likely stocked by anyone else.  Many of these routinely installed parts are often not listed on the service invoice. We custom design modifications for each channel's record and playback frequency response equalization circuits, as necessary, to adhere to the exact pre-emphasis and de-emphasis curves as specified by Nakamichi to obtain optimum performance.  A precision alignment and tweaking of the transport and electronics is critical so as to meet or exceed the Nakamichi factory specifications and to ensure peak performance with continued reliability.