The newer Hacker 77s will not fit in most riggers - they are too wide. A narrower alternate is the Barracuda 80, or the Barracuda 125 if you intend to push your equipment - either for less than the average Navy 77.
If this is a Graupner Tornado, it is far too small for 12 cells. Even if you could fit them inside, the boat will be grossly overpowered and uncontrollable. It is suitable for moderate 6-cell BL power at most.
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