[Doug]

A multi-funtional gauge that helps you set your wheel-sets and check track gauge. I'm building quite a few points and this help to make sure everything is fine before I run into problems with the trains. The shape of the gauge itself also gives you clearances of structures, bridges, tunnels and platforms based on the AAR (Association of American Railroads) clearances. There are several track gauges in common use for the OO scale market ranging from 16.5mm to 19.1mm. The NMRA Standards reflect a 4'9" track gauge. Manufacturers are encouraged to label both the scale and the gauge for these models. Sure it's American, but what is readily available for Europeal OO and HO layouts? At least this helps in getting the track and rolling stock working together without having play around with calipers. For more information about the gauge, see the NMRA site here: http://www.nmra.org/standards/gauge.html You can pick it up on eBay for about $10.