I have an alternate view.
We have found that B&O often specified its own proprietary sideframe
designs, and provided them to DuBois shops or even manufacturers from
the Mt. Clare foundry.
Research is ongoing. There are many word references to B&O freight
truck designs, we of the B&O freight car mafia are trying to tie them
to particular side frame drawings and car orders.
When we get them sorted out, even just one, we can have the model
truck makers produce them for the pure of heart.
In the meantime, Ed, the Accurail "Bettendorf" is an adequate stand
in for the forseeable future for your M-53.
--- In STMFC@..., Richard Hendrickson <rhendrickson@...>
searchdirections F&C says to use the trucks of your choice. I've
help.the archives and found a lot of references to the M-53 but could
spring planks and Barber lateral motion bolsters. That's a trucklateral
motion devices the new Tahoe Scale Models Buckeye truck would be aon
them, though if someone has an image that shows the express carthem.