How about a working scale-sized electro coupler retrofit?
Don't get me going on this!
I am still waiting for a MTH version.
I was disappointed that the G scale version snaps when under very heavy loads. So I guess it's better to wait for them to get it right.
I have run big consists outside in G scale and have to use KDs to haul and handle the stresses. The stock MTH G scale non-electric coupler seems to hold better. There are too many couplers in G scale that are not compatable with each other. I imagine there is a lot to designing the perfect coupler that is near scale, and works with all others in the market.
If MTH released an electric scale coupler in O scale that had flaws, everyone would be bashing them.