Hi Guys, Just a follow up to the problem i was having.... I got on the phone with one of the guys from Hornby Hobbies and went through step by step - The Cars, the track, the power base etc. The conclusion was that for whatever reason 2 of the cars were shorting out the track. They very quickly sent out 2 new cars which work like a dream and havent experienced any problems since!! I've returned the other cars back so they can test and work out where the fault was exactly - hopefully they can find something that can help in the future or maybe in was just one of those things?!? Either way, thanks for the interest in my issues, particularly Andy / Woodcote - your time is your most vaulable commodity and you gave / give plenty of it to help "us" all out! Thank you again. Can't speak highly enough of Hornby Hobbies either - they were great through the whole process!! Happy racing! LJay