One of the companies at SELWG 2021 was Irongate Scenery. One item that caught my eye was their Ballista. It comes without a crew, but I'm going to use some Oathmark Humans to build the crew.
It is rather large for Oathmark, being approximately 55mm across the front.The bolt is approximately the same length as an Oathmark Human Infantry spear, so some of the unused spears are going to be used for some spare ammunition.
The string needs to be added, I will drill out the block behind the bolt to take the string.