I am note sure if this problem has been addressed before. I made a racing line curve out of 2 CLC's. All cars pass through the racing line without incident. If I choose not to use the racing line curve that is i do not press the LC button then I have a problem with Slot.it cars comming to an abrupt and sudden halt as the guide slams into the inside rail immediately after the flipper. What is happening is as the guide runs an long the edge of the flipper, it exerts pressure on the flipper and when it passes the pivot point the pressure changes the flipper and exposes the leading edge of the rail. Is this due to the Slot.it guide being longer than the Scalextric guides and do you recommend trimming the Slot.it guides to the same length as the Scalextric guides. The problem also seems to be related to the magnetic force, the stronger the magnet the more frequent the guide collisions. The worst offender is my Slot.it Ferrari F40, I need a crow bar to get this on off the track!