Frank, the Bettendorf design of this truck varied over time, and
in addition there were other truck makers who licensed the basic design
but made small changes to suit themselves. Many modelers automatically
follow the term "T-section" with "Bettendorf" but there were certainly
other versions of importance.

So which is the original Bettendorf design?

A guess: like those on the B-50-13/14s? I've seen that design I think most
commonly, with the almost equal angle on the top and bottom of the side
frame.

Frank Valoczy
Vancouver, BC

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