Dan and John talk about how to achieve a standard coupler height for your rolling stock. Dan demonstrates a method for raising your coupler and one for lowering your couplers to match NMRA standard. This will help your trains stay together, especially on steeper grades. Dan also explains why he uses certain wheels on specific rolling stock. This is one you will not want to miss - lots of good info! ©2012 TSG Multimedia. All Rights Reserved.