I have added Evan Designs fire kits to multiple Lionel, Weaver, and Pecos River steamers. The kit works fine and runs directly off of track power. I suggest using the pico size fie kit. I used a small piece of brass or copper (plastic could also work) that I fashioned in the shape of the firebox door. I drilled tiny holes or cut an opening in the door. The pico LEDs where mounted on a clear piece of plastic and this was mounted to the backside if the door. Finally, this was then glued to the fire box. A couple of phots are attached.