I need to remove a drive wheel from a Broadway limited PRR M1b 4-8-2 to send back to replace the nylon gear on the axel. What is the safest way to remove from the attached rods? (needle nose pliers?) Is the screw normal thread (turn: Righty tighty, Lefty Loosey) , or reverse threaded?) There is very little to grip on the screw head (Middle tire in picture) Thank you all!