A look at Sergent Engineering couplers, a more prototypical HO scale couplers, and some of their pros and cons.
Theme Music:
"Professor Umlaut"
Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
http://creativecommons.org/licenses/by/3.0/
Italian Morning by Twin Musicom is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/)
Artist: http://www.twinmusicom.org/