thanks for your reply, I think the problem is with the straight lane change, the lane change is right next to the power supply and on a long straigh, I have about 20+ digital cars and all the same result, since first post I've noticed when the flipper is in the straight position it will flip open when triggered but it will not flip back after any car passes back over it also the flipper sometimes sits in the middle, any ideas for the track or is it knackered