I decided to do an upgrade of a Athearn F45. I've had this loco for over 20 years and it needs some tlc. Here are a couple of shots before I start tearing into it. My first step was to redo the chassis, which means rebuilding the recessed step in the fuel tank. I cut out the area with a Dremel tool and then rebuilt the step with styrene and body putty. After I finished with the chassis it was time to reinstall the motor and a DCC decoder.