I was comparing the Wheel Standards Diagram and Dimension in the M.E. Handbook and as shown on the Seven and a Quarter Gauge Society Website “Standards” Page.
There are quite a few differences and so I have shown Society Wheel Width but managed to retain M.E. H/book Flange Depth.
N.B. M.E. H/book Edition 4 still shows an incorrect Metric B2B of 172mm, when it should be 173mm – despite my alerting the Publishers to this error when Edition 2 was first released.