Its similar to the Smokey Joe chassis. If you take motor out(not recommended unless you have to), it can be tricky refitting the metal retaining wire.
Otherwise a good basic chassis, but don't pay too much for it, plenty on sale second hand, but if they have been run into the ground by young operators, the gears might be wrecked.
Mentioned it before, but for some reason Chinese made ones have slightly better motors. I have not noticed difference, but its what some say.
Narrow gauge Francophile interested in 1m, 60cm,50cm , 40cm and smaller gauges . Build in scales from 1/6th to 1/24th. Also 1/32nd and 1/35th using 16.5mm track to represent 50cm and 60cm gauges. http://www.rue-d-etropal.com