Ok, understood. I wasn’t familiar with that Lionel unit, my existing O27 ones have the four-wire, two-button set-up.
The K Line instructions look like this;
Comparing that to a Lionel lock-on yes, I see that it goes to the centre rail tab. I’d expected it to go to the other side?
On a larger layout I would go to a fixed terminal on the transformer, but under the circumstances (the door layout is portable, and not really capable of running more than one loco at once) I’ll run it from the traction current.
I have a coal loader set up to a separate supply, but I don’t want to risk a short circuit
