Kenneth, I read about that very method of mounting a knuckle coupler on a forum somewhere, and I absolutely cannot remember where...maybe the Gn15 Gnatterbox? Also, I use link and pin couplers on my scratchbuilt shorty mining equipment that I run outdoors. My cars stay coupled! But switching, pulling the pins on a railroad that's less than 11" above grade...it's too much of a hassle. And lining up links and inserting pins is even worse!! They sure do look nice, though.
SandyR
SandyR