Since I updated my other thread, I may as well update here too. The repairs were ultimately done out of warranty.
One gearbox was stripped and the repair agent recommended that the other gearbox be done at the same time. My marbellite pool floor was also harsh on the rubber tracks so those too had to be replaced. At the time of writing this post, at the present (horrific) exchange rate (for me), the cost was $60. A couple of hoses were replaced under warranty as they are individually serialised.
So, the running cost (for me at least) for the Zodiac MX-8 will hopefully not exceed $60 every 2 years, or $30 per year accrued. To put this in context, the unit currently costs the equivalent of $182 in my country.
It must be said that the running cost can be cheaper if you DIY and don't go via a repair agent.
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