A friend of mine has a small layout with a ZTC system. He only uses it occasionally and didn't even know about the ZTC issues until he bought himself a new engine the other day.
It's the Hornby model of the EWS engine? Please excuse my ignorance but I'm not a modeller!
The question is what is the best/simplest way to fit a chip to this engine that will work with a ZTC controller? Are there, in fact, any alternative suppliers of chips to suit ZTC?