Thank you, TNCENTRR. My preference for unit trains stems from seeing long oil tanker drags and long coal drags in real life, although my current favorite railroad, The Put, had short mixed freight, often with wide and over-sized loads.
When an idea for a new topic to post occurs to me, I go ahead and post it if I think others will find it entertaining and interesting. Most of the time, ideas just pop into my head, often when my mind is on something other than trains. I think that the ideas come from the subconscious mind. I had the same experience with songwriting in the past. Arnold