The Classic Collector Series included 5 19th century trains that were released in the 1980's.  The Dewitt Clinton, the Lafayette, the Pegasus, the John Bull and the Prussia all with 140-xxx model numbers.  It appears that several of these were re-released in the 2000's with 006xx model numbers and were upgraded with the newer transformer and NS EZ-track.  Were there other changes?  Were all 5 re-released?  Is there any documentation on this series other than what's on the boxes and in the catalogs?