@Rockershovel, as you have been told many times in many of your inquiries - almost all American O Gauge like Lionel, K-Line, MTH etc is designed for the century old low voltage AC standard. The exception is most LionChief, LionChief+ and LionChief+ 2.0 can optionally be operated on low voltage DC (but not in command mode as command control requires Low Voltage AC at 60Hz).
For a rule of thumb, if you want to modify your locomotives to run on the bizzare and non-standard conforming low voltage DC of your club, it must be equipped with a DC or Universal Motor. You must remove all electronics and bring the power leads direct from the track to the motor. Note that this makes running them on AC impossible (with out destroying the motor) unless you add a high amperage bridge rectifier. Since your fellow club members seem to have success with this setup, they would be the ones with the most experience in such modifications.
If you are serious about operating a fleet of American O Gauge locomotives, it would be much simpler to convert a single power source setup to provide Low Voltage AC than to keep modifying locomotive after locomotive...
