Your recent request for advice seems to have gotten lost somewhere. Allow me to summarize: I had suggested that you pursue your passion and hopefully incorporate (the design of) trains in your grand scheme. This is somehing I was able to do. The post immediately following was from a teacher (name escapes me)who offered very sage advice about your education and goals. Hopefully we will get a repeat post. Allow the trains to come to you after your field of choice is mastered.
Lou N