who knows ZYX retipping or refurbish ?

I send my cartridge directely to zyx for an "official" repair and they done it because my cartridge was no more on the market and I didn't want the "ultimate" serie as I don't know them. I also had a suspension problem with another cartridge from ZYX, I send it back and they changed the suspension, so they can repair their cartridge, not only buy you a new one.

 About the problem of sealed bodies, the problem is not a problem when you are the manufacturer, you just have to "crack" the bodie and place a new one, I think a new bodie should cost them at least 10$  ;-)

@andychris good to know, but you said the price was almost like the brand new model from the newer series, once i upgraded from Airy III to Premium 4D the difference was noticable. Which old model you decided to keep?  I believe the body is the same as the Airy and surely on the factory they could replace the body, but aftermarket retippers can't do that anyway. 

@nandric do you think nakastuka-san just sent him a brand new cartridge anyway?

If that was an old model like Yatra or Fuji then the generator must be different compared to the latest models. I think the better idea is to upgrade to the latest models if the price is the same or very close, but @andychris decided to keep his old model fixed somehow by Nakatsuka-San, because he's the only "official zyx". If the story is truth then i don't want to speculate on it. 

But we don't know who was the distributor, because you can not contact Nakatsuka-San directly, and which model it was.