After many years, I'm replacing gears and motor. Most of the screws are impossible to extract and I've drilled them out. None of the parts diagrams define what is needed for the new motor, gearbox parts, etc. The Bachmann website does not provide parts diagrams and I'm working with verty old diagrams that exclude all motor related parts. I've ordered al of the parts but not the screws. Maybe the parts come with screws? That would be a nice touch.