If showing your trains at a Lego event, how much do you run them?

Hi there, question for the group. I'm going to be exhibiting at a local Lego show for the first time next year, and my display will include a train powered by an 80's 4.5v battery box and motor, as well as a 9v monorail system. My question is - if you've exhibited before - how "much" or how "often" do you run your trains at a show? Obviously it's cool to see them running around, but are there best practices for not wearing them out? submitted by /u/conspiracyhand [link] [comments]