The first photo shows the new Sergent coupler installed.
I removed the Walthers ProtoMax first, and then the new Sergent couplers were installed in a Kadee #802 coupler box. I then used two screws to install the coupler box. The S-Helper Service cars provide the holes, so it is easy to install using these coupler boxes.
This is what they look like when they are coupled up. Looks very authentic. I'll apply weathering powders later on.