At the sharper radii used with the prototype 2 foot gauge, especially in “industrial” use (say, for example, with Hudson track), the gauge would be widened by half-an-inch or even more, so a model track gauge of 14,3 mm would be more accurate than 14,00 mm on curves.
As John has said, it is the back-to-back measurement in relation to check-rails in points that is critical. In the unlikely event that it proves to be a problem, use the jigs to build all the running rails and then use a custom made spacer (aluminium, blackened brass or steel or even wood) to space out the check rails from the adjacent running rails when fixing them in position. The check (wing) rails at the crossing in the point shouldn’t pose a problem unless your flanges are too course.
David Woodcock
Champlon, Belgique
