[electricboats] Need some mechanical help in UK or Oz to prepare for electric - anyone recommended?

We are planning the parallel hybrid on our powercat.
At the moment, the thought is to attach a plate to the existing shaft-gearbox coupler (which I assume is there for some flexibility, like a more modern flexible coupling?) - see photo below at centre.
It has 4 bolts, and I think it could take a machined circular disc with width enough for a serpentine belt (to take the power of 10kW or so!) and cutout centre for the prop shaft.

So some questions for the world :)...
- can we add in the plate and use longer bolts against that coupler?
- how big a serpentine do we need to run 10kW through it?
- if we bolt onto the shaft side of the coupler, where there is space, can we sit the electric motor on the hull rather than the engine, since the coupler should have taken all the engine movement out of the equation?
- can we use a split plate with 2 bolts each instead of a single? If so, maintenance could be a lot easier!
- would steel be right for the plate?

Given all that “thinking”, I need some mechanical genius to tell me I’m wrong and work with me on making it right - does anyone know someone like that in the Solent area (boat) or Australia (us right now)?

Rob

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