The crew are a combination of bits. Heads from FireForge Mongol plastics with Bodies from Gripping Beast Dark Age Warriors. Just something I thought I would try to see how it would look. As crew they look fine in my opinion. In 'Kings of War' crew are purely decorative and have no game/rule function. The long pole they have are intended as the winding device but perhaps I could place an arrow head on them for the next reload.
The large iron bolt throwing machines are actually from the Goblin range by Mantic. They have a perfect space for a Mongol shield rather than a Goblin shield or symbol on the front. They are both mounted on 50mm square bases. These are a great model and are metal and it's been a long while since I constructed something metal and of this size. A little cleaning up and a little filing and they go together reasonably well.
Cheers from Brendon