What are your thoughts on the Dragon tape deck?

Speaking of investing and Nak decks, let's go back a few years... I've got a 582, which was top of the line in 1980, that I've been nursing along all these years. It has 3 heads, adjustable azimuth, etc. Sent back to Nak 3x, and the third they didn't fix it right. I'd still like functionality in the casette medium.

Can anyone offer experience on how the 582 compares to these other (newer) decks?

I figure getting it fixed might cost me $100, whereas buying a used newer version would cost more. Sorry if this is an intrusion, I figure there are only a few people these days versed in the world of Nak's!

I just spoke with a certified Nak repairman, who told me that the mechanisms on the RX, BX, CR, MR, and DR series are inferior relative to other Nak series. He said that the best Nak tape mechanisms last for decades (still yet to have an endpoint). This includes the Dragon, the 58X series, and others that he did not mention (I assume all but those listed above).