Having model train couplers at the correct height helps to keep trains together. If a model train comes apart when you don't want it to, that's no fun. In this episode of Model Building Tips, Dan talks about ways to correct the coupler height on model trains. He talks about how model train couplers work, coupler height gauges, trip pin pliers, and other tools needed to do the job. Dan also goes through several HO and N scale examples, both cars and locomotives. There's no onesizefitsall fix to correct coupler height, so Dan demonstrates a variety of techniques and tricks to get the job done. He works on model trains from Athearn, Atlas, Broadway Limited, Kato, and Sunset! If you want to work to make sure your trains have the correct coupler height, be sure to watch!