I had the identical Zodiac version with a 9.9hp, 2 stroke Yamaha.
Clever design with the folding transom, but as you have noted the hull is very flat. This can lead to slamming in waves, but also means it has a decent turn of speed and can plane with quite a bit of weight on board.
Performance was great, got about 20kts out of it with 2 big adults on board.
Its a great boat, enjoy it.
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