Theuns, cool scratch building on the tripod mounted warhead.
For sure, adding a figure would give it a semblance of scale.
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Steve, you definitely achieved the look of wood on those pieces. I've looked at few photos of original cannons, and found some did have multiple sections, while others it was just the base platform that appeared separate from the sides. I'd suggest google images of the ship or historical place your modeling here?
regards,
Jack