Hello eSurfers,
One of the two engine of the Onean Twin ceased to work, some kind of seized impeller : the axis is harder to turn. The other turbine/impeller is fine.
Having not the skills to repair it, I am selling the Twin, the 2 batteries and all the accessories.
I live in south of France near the town of Toulon.
Just in case, if you know an industrial motor specialist who can repair one of the turbine, that would be sweet if you can share the info as I am still open to the idea 
In any case here is the details :
–— 1 Onean twin + accessories
The other turbine works very well and can therefore be used or recovered
The blue tooth reception system works well
Used 30-40 times and I took good care of it: regular greasing of the contacts and shaft and systematic rinsing after each run.
Supplied with a wide range of accessories:
Remote control and box
Remote control recharging bracket
Spare remote control straps
2 Fins + 2 new spare fins
Toolboxes for removing the propeller and contacts
Spare battery caps
Various spare screws and brackets
Several straps
Marine lacquer
Leash
Spare contact magnets
Instruction manual
Can be sold with 1 or 2 batteries. Special price for the set of course
–- 2 Batteries for Twin Carver Manta Carver X
Works very well. Recently tested.
Used 30-40 times (i.e. 30-40 charging cycles)
Rigorous maintenance and storage: greasing of contacts, charging before use, winter storage using the principle of cold storage at 40% charge level to avoid structural discharges.
The original box and instructions for use are supplied.