And if anyone was vaguely interested in the outcome;- reply from Bachmann services," no longer available as a spare". If Harrison,a woodworker could make the first nautical clock, I guess I better start within'.

Having ordered new chassis, I got a bit brave and took out worn gear. Downloading photo seems beyond me. The exploded drawing don't seem to show the gear I have. It is the stepped gear; larger (worn) drive by worm and smaller moulded on as one item. Any wise person have a box full or know the part number. If I can get old chassis working I'll have an excuse to be in the shed (and out of trouble) creating some useful doc like cover.

Your details passed to me by Greg Elmassian. I am very happy to find two well informed men in the community to help. It revitalizes my faith in humanity after the shark at the Tombstone store.
Thanks to both.

During visit ti USA from GB I was conned to buy a 'new' (Oh no it isn't) I now find the brass worm drive has shredded the next nylon gear so loco u/s.
I has seen Bachmann CH 90094 on line. Is this the right chassis?
Help/advice please.