If you work at, it to quote a comment from another member who talked to a Scalextric demo man. 30m is the limit. It will be half that if you use 2A not 1A type powers. This is without using booster cables. The scalextric man recommnded minimal amounts of marine conductive grease. However I have not used that. With new Sport track I run upto aboubt 12m without booster cables but the track does need a lot of TLC to make sure it is fully connected. Always trast the trac with a break one side of the powerbase so that you get continuity all the way round. INOX 3 does help.