On the upper right of the home page of the Guild website, there is a link for finding an engineer. You should find about 12 engineers that serve the TF community in Vermont. Perhaps you can easily find a compatible engineer nearby. Additionally, you can find in the Guild store Historic American Roof Trusses to help with general information. I would caution against mimicking patterns of trusses and try to understand the mechanical problems of joints as well as timber sizing, along with forces in static equilibrium in a truss.

Take care