... track: Track Gauge: 18.8mm MIN Check Gauge: 18.0mm MIN Crossing Flangeway: 0.8mm- 0.85mm Check Span: 17.2mm MAX Wheel Width: 2.0mm MIN Back-to-Flange: 18.0mm MAX Back-to-Back: 17.3mm MIN RP25/88 wheels (0.6mm flange): 17.4mm MAX EMGS wheels (0.5mm flange): 17.5mm MAX I have now added this to the list of gauge/scale pre-sets in Templot, with the name EM4 (18.8mm gauge, 0.8mm flangeway). In the next program update: 2_241151_060000000.png Check rail chairs for 0.8mm flangeway are available from C&L -- see: http://www.finescale.org.uk/index.php?route=product/product&path=346_347_348&product_id=3938 The 0.8mm flangeway is narrower than a rail-width, so retains the "P4 look" while accommodating the thicker EM flanges. Unlike ordinary EM, this standard is not suitable for widened RTR wheels (RP25/110). Note also that this will have similar problems to H0 -- it is difficult to find space ...