Marx’s most popular locomotive might be the 999, because it can pull anything Marx made–6-inch tin, 7-inch tin, 3/16-scale tin, 4-wheel plastic, and 8-wheel plastic–without looking out of place. It really only has one problem: The front trucks on many 999s are prone to derailments.
Counterintuitively, the fix for a 999 is the opposite of how you fix the same problem on many other O gauge electric trains.
David Farquhar is a computer security professional, entrepreneur, and author. He started his career as a part-time computer technician in 1994, worked his way up to system administrator by 1997, and has specialized in vulnerability management since 2013. He invests in real estate on the side and his hobbies include O gauge trains, baseball cards, and retro computers and video games. A University of Missouri graduate, he holds CISSP and Security+ certifications. He lives in St. Louis with his family.