[woodcote]

Thanks for the review - and a reminder that simple solutions can be the best. 

The Carrera bridge timer and the Ninco N-Scorer are both very nice pieces of kit and - with a little attention to height etc - will work across all scales. They are so versatile, pretty easy to use and extremely portable.

An alternative I use these days is a lap counting app on a phone or tablet. I use LapTracker and love its  simplicity for one or two car racing - perfect for testing or a rally stage. I’ve also been playing with the RC Timing app, which is a bit more complicated, but supports multi-car racing. There are various other options for Apple and Android devices. The lap timing apps that use the camera are what works with slot cars.