My one comment would be that the ribs of a truss are the responsibility of the truss designer/engineer/manufacturer. If you are that person, then I can see why you would want to model the ribs. If you are the building designer, then the heel height of the truss and the roof pitch would be the only parameters you would want to input and have control over. The out-of-the-box truss objects do both I think.
Indeed Aaron, you are correct. But my goal is to show open trusses without a ceiling in a 3D render in Twinmotion. Thus the ribs / webs of the truss does not need to be perfectly correct, but need to be shown with sufficient detail and accuracy to be used for presentation renders. It seems the "Truss Maker" tool works for this purpose.
ArchiCAD24 - since Nov 2020 Revit - 2005 to 2020 Windows 10 Pro 2 screens: nvidia quadro RTX 4000
This would be something you could make with the param-o tool, if you feel like you need to adjust the dimensions a few times during design.
I ussually estimate how many times I would adjust the element and how long it would take me to do a bit of basic math to plot out the connection points and boundary of the shape. If I feel like I would use the element in multiple projects going forward, it is often worth spending 1-2 hours to make something parametric.