late Gothic crossbow construction

[stuckinthemud]

Hi Guys,
I am in the middle of a (very) long-term project to reconstruct a mid/late Gothic composite crossbow. I am a reasonably skilled carver, can build long-bows, can work deer-antler and am learning to work with horn, sinew and traditional glues. I have read everything I can find, and have looked at relevant chapters from Die Armbrust. What I need is a decent set of measurements for a 'typical' composite prod of the type used for hunting, not warfare, from the mid to late 15th century from the Saxony region. Can anyone help? My ultimate goal is to construct a reasonably faithful replica of the Ulrich bow, but I do not anticipate undertaking that project for a few years, a generic mid-15th century Gothic bow is the next step for me.

Thanks in advance
Andrew