Hi PBJ....
Yes, missed a k there in the brand name: Sankyo. But the point is, the Sankyo transports are small and plasticky, of a much lower pedigree than the previous ones.
Apologies if you meant for me to keep it forever or return it, I understood that you were not using and it had issues
so I could take it and do what I wanted with it. Surprised you put over $100 into a Nak 480 - Oouch! I have another one if you want one back, just have not checked it to see what is up with it. Yours had a bad Dolby chip, so I extricated one from a parts unit to get recording recording working ok. I also had to adjust the teleflex cable that switches between record an playback mode (that part is notorious for needing work after a couple of decades).
Pepe
Whenever I have a deck I am not using I try to promote the cassette hobby by passing it to someone with none.
Nakamichi never used Sanyo transports. They used Sankyo transports. I'm glad someone is getting use out of the 489z I gave you. I had put over $100 into it.