So, here’s my Williams die-cast Hudson with its new pilot wheels. They are turned steel, 17mm dia, coarse Scale flanges, on 3/16” axles, from Walsall Model Industries - a specialist supplier here in U.K. (For U.K. readers, they are “Lowmac” pattern). There don’t seem to be any clearance issues and they track nicely on O42 track, they are still slightly undersize (32” ) but the flanges are near-enough the same overall dia.
