I am new to using Gargraves track and I have some manual O 42 switches. Is there any special wiring that needs to be done to these so the engines don't stall in them? I set up a test track with a three foot piece of Gargraves track and one of the Gargraves O 42 switches at the end of it. The engine runs fine on the straight, but stalls at the switch. Does the switch need power at all ends for the engine not to stall? Any help you can provide is appreciated.