I appreciate your points and admit, when I thought about having this tool years ago, I was just wanting a truss representation, with a few options for commons, mono, scissor, parallel chord, etc. But you are correct and could be the block to getting this included . . . engineering. However thinking about the recent improvement to the spotlight lighting trusses, they are able to input the loading, and would assume materials.
I am not in to Marionette yet, but you make it sound possible. True??
Thanks again,
Richard