Got a couple of used A-Units from ebay to convert my non-powered B-units to powered. Pretty easy change out. Though I will have to paint a portion of the bottom of the Star Trek version
Trained as a Physicist - I have worked in telecommunications for the last 18 years as a problem solver and 911 tech. I love trains and LEGO and my YouTube Channels are Train Tsar Fun, BrickTsar, and Jaabo37. Trains is a feature on all of those channels.