2036 was my first train and still have it with the rooling stock track and transformer and run it today. I would replace the front pilot as it has been modfied. Obviously the 6466WX tender didn't come with it as it has a knuckle coupler in the rear which must be attached with the screw in the rear pilot. There should be a rivot there.
That is one well played with loco.
" The e-unit doesn't like my fastrack switches, but it is running great on a basic upper level oval."
I never had a issue with mine.