If you attended a Greenberg train show in the last 25 years, you likely saw a presentation of Lionel post war accessories and products by New Jersey High School teacher Roland LaVoie. Sadly, Mr. LaVoie died last week. Please see the link to his obituary below. I am sure his enthusiasm for Lionel (and later on, MTH) O gauge products during these hundreds of demonstrations, prompted the "spark" for many to enter (or return to) the hobby, as it did with me. A true Ambassador for the hobby if there ever was one!
http://www.legacy.com/obituaries/courierpostonline/obituary.aspx?n=roland-e-lavoie&pid=158036037