Just a quick note about the KM wheels.
At the moment they are out of stock and I don’t know if I will be able to restock at a reasonable prices. KMEngineering are now a general engineering company and making the wheels is just another job for them. Judging by other items that have been commissioned with other engineering companies, the cost of restocking may easily double or triple. In addition they won’t come mounted
I do now stock DCC Concepts wheels which include 14mm coach wheels. They are insulated one side and include a spring pickup on the axle for coach lighting. The main difference is that the profile does not include the 3 small holes.
Hope the info is helpful in your decision making