Yeash, it's that initial CAD-like processing at the beginning that scares me the most. But most likely because I virtually have no experience with such things. I've used some modeling progams before working on model train layouts, but I'm usually plopping pieces down, adjusting slopes and marking table dimensions. Even then it's a task for me to get what I want out of it. If I had to design and draw something form complete scratch... I doubt I could do it.

-tg