I don't remove the 3 rail coupler tabs on the ends of the trucks. I usually cut the end off of the back of the regular KD coupler boxes. There was an engine that had to have the short KD version as the trucks are mounted so close to the ends of the engines that there's less room. I forget which engine that was right this second?
https://kadee.com/htmbord/page743.htm
I bought a used engine from a member that already had the truck tabs cut off. It seemed like so much more work than just using the right coupler or cutting the KD box.
