Since I have operations where we are focused on switching cars by specific car number, I have to have Kadees on every car. I have even tried other brands of working couplers, but they are not really compatible with Kadees when you want to uncouple and couple for switching.
On USH cars, I fill the the shank slot in Kadees and file off the tab on the bottom. Then I drill a hole in the shank filler for an appropriate screw, often 2-56, 0-80 or somesuch. If the hole in the coupler box is too large or stripped out, I tap the hole in the shank filler.
