Good afternoon, everyone.  This is my first post and I have a question about Lionel’s Freedom Train (6-21791).  In the 2003 catalog, Lionel makes statements like Freedom Train (TMCC Alco PA Diesel A-A PWR & DMY #1776), operating marker lights on powered and non-powered A-units, momentum flywheels in powered A-units, fan driven smoke units in powered and non-powered A-units, lighted cab interiors in the powered A-units, engineer figures in both A-units, and length: A-unit: 16 1/2" B-unit: 16".  Did the set come with, or did Lionel later offer, more units that just the ALCO PA-1 pictured in the catalog?  Thank you for your help.