Nigel Lawton was demonstrating a 7mm:ft scale version of his 20hp bow-framed Simplex kit at ExpoNG 2008. Originally developed for OO9, the etch artwork for the new loco has been (literally) scaled up with some changes the drive system allowed by the larger size.
While the OO9 loco relies on a friction drive for the reduction gearing, the 7mm kit has a more conventional belt drive and the further modification of a working radiator fan. Currently this is linked to the direction and speed of the Simplex but Nigel has some ideas to keep a constant fan operation even on DC power. There should also be room to fit a small DCC chip inside the engine cowling.
The kit should be available late 2008 or early 2009 and can be built to 14mm and 16.5mm gauges.
Precision turned Track Gauges are now available from KBscale. Produced in brass with grooves to suit Peco IL-115 code 82 rail. The outer grooves are for setting the 14mm gauge and the inner grooves give a 1mm gap for the check rails as per the published O14 standards.
The gauges have a machined flat at one end to give clearance when used over a turnout crossing (frog).
They cost £4.50 from KBscale (website has online ordering).