I am currently building up the MDC HOn3 2-8-0 (outside frame)but have run into a few problems. First I'm building it out a a large collection of parts that I got from a fellow modeler but I have no drivetrain assembly instructions. I'm trying to figure out which side the insulated driver wheels go on. I've also trying to install the NWSL re-gear kit but I can't figure out how to remove the old worm gear off the motor, does anyone have any ideas? Any help in greatly appriciated.