Hi all. I bought a Mainline 43xx today. It is a very strong runner, and a good bit of kit! One problem, though. The spurs on the bottom of the leading pony truck have broken, meaning that the axle just falls out. Does anyone know whether the CURRENT Bachmann pony truck is a direct replacement, or has it changed since their first chassis? If not, has anyone got a spare pony truck lying around? Any help greatly appreciated.