If I install the 44958, (or some other decoder or PWM motor driver) do I need to remove the circuit board attached to the motor, or to the polarity switch?  I'm guessing this is a capacitive circuit that might possibly short-circuit a DCC signal.

If I do disconnect the circuit board and wire power directly to the motor,
what are the consequences?

BTW, ACD134, how are photos and video coming along?

Just posted to this thread, but now the "next" button goes to the next thread,
not next page i the layout thread like it did before.

I don't see much use for Toby without Henrietta.  But just curious--would the real Toby-Henrietta run backwards for a return trip, or would there be a turnaround? I'd think Toby-Henrietta should run back and forth, nor round and round.