Has anyone installed N-scale couplers on HO-scale locomotives & rolling stock? If so, what did it entail and was it worth the effort to you? Moose have several "some day" projects, which include building and/or modifying HO scale locomotives and rolling stock. If Moose does this, then it would require changing out at least 3 pairs of locomotive couplers and 6 pairs of rolling stock couplers. Locomotives are Mantua, Spectrum and Rivarossi brands; rolling stock are Walthers, Kadee and Tichy brands; all manufactured within the past ten years except a Walthers boxcar.