I have recently acquired a Bachmann 4-6-0 battery operated loco (the green and silver one), and I am going to "bash it", however before I start I would like replace the driving wheels with metal ones, don't mind if it's a complete motor block, and as I am stripping the remote out, not bothered on the voltage, but a "drop-in" fit would be nice. Can anybody tell me is Bachmann (or other retailer) does such a beast, as I am sure the Bachmann experts out there will have the answer, and maybe some alternatives - many thanks in advance.