Around the time the carronade was introduced on British ships the French had a similar weapon. Only it fired exploding shells. It was eventually abandoned because of the danger it posed to its own crew and ship.
Anyway, the ancient Chinese cannon is braced on the ground like a modern mortar. I've never actually seen it in game. If I remember correctly it uses the regular cannon effect.
This sounds much more practical than throwing, and charging with a saber.
I'm currently stalled on mesoamerican ships. Progress is slow.
I d/led most of the LH you posted Geddon. Some of the links didn't work. I was wondering why you didn't just upload them, rather than link off site.