Hi there, hopeless vintage audio fanatic from Australia here. Love my cassette decks and have restored many Nakamichi's.
Thanks, Just a hobby I do on the side. Working on a National RX-C300 and a Sony TC-755 at the moment. Naks are wonderfully engineered machines but very time consuming to work on (higher end models).
There was some Nak Test Equipment for sale in the USA recently, it had an assortment of mechanical tools for fixing the decks. The seller wanted big money for it, it might still be for sale.