who knows ZYX retipping or refurbish ?

Sorry I didn't explained very well. If I send it back to ZYX for repair, what do they do ? :       retipp ? exchange ? repair ?   some say they refurbich, some say they send you a new one. What is the truth ?

In fact , nobody knows nothing about ZYX . My question seems to be simple, what ZYX does when you send them a used cartridge ? They repair it or give you a new one ?
 I'm not interesting in retip by other than ZYX. I don't need a zyx cartridge that doesn't sound like a ZYX cartridge.

So after months of talking, you've got 2 options with your old zyx :
- exchange with a new one ( new version)
- or repair if you want to get the same cartridge if it's no more available

Both are the same price, around 65% of the the new value

That's not correct, they can repair your original cartridge if it's no more available on the market, but the price will be the same as if you want a brand new cartridge from the new serie.

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$  ;-)