Was just looking over a few Lionel sets, and began to think about Lionel's formerly frequent use of the Add-On car to "complete" a set. I was wondering if this was also a practice of K-Line and/or MTH?
A few "for instances"
FARR #5 PRR - a stock car was the add-on
Santa Fe Warhorse Hudson Set - a weathered boxcar was the add-on
Burlington Northern SD-40 Set - boxcar add-on - did this also get a dummy engine?
NYC Service Station Set - lightning stripe caboose, and a passenger car 4 pack
Conrail Dash-8/JB Hunt TOFC Set - add-on was a 2 pack of TOFCs w/ ETD
Finally - the most egregious example, in my mind, was the 8103 "B" unit issued for the 1990 Santa Fe ABA F3s. This caused a lot of consternation & aggravation for a lot of collectors.