any tips and instructions on how to remove the center wheels on this beautiful Hudson. I want to install the wheels that came with this engine that accepts a traction tire. if you're pulling the 6 heavy weights that this engine was meant to it slips a lot. and if you're on a grade it cannot pull more than three cars at 18 to 20 volts. Any help would be appreciated. I have read that it is easy to break the center screw that holds the wheel on.