Hi....thanks for the advice everyone. I’m mostly using Scalextric cars, digital and analogue. But, I have run a couple of catrix without issues. The oldest Scalextric cars date back to the classic series of 2007, but again they ran fine. Question, if one of the older cars are pulling too many amps, eventually the power base would reconfigure? I’ve spoken to technical support ( who have been great) and ran them through the problems, for instance isolating the base, cleaning etc and they have agreed to replace my set. I hasten to add I don’t run competition cars, but I’m intrigued to find out if and how older cars could pull too many amps, and how I can find out to avoid any future problems. Anyway, thanks for the advice to date, any more is gratefully appreciated and despite the frustration of being without the set for a few days I can’t fault the company’s technical support and picking up and replacing the set.