If uncoupling is the issue, here's an idea as well
http://members.shaw.ca/sask.rail/construction/lsbuild/coupler.html
A good friend of mine also paints his couplers to keep them from uncoupling during runs, and he runs very long strings of cars.
http://members.shaw.ca/sask.rail/construction/lsbuild/coupler.html
A good friend of mine also paints his couplers to keep them from uncoupling during runs, and he runs very long strings of cars.