ive got 2 set of scalextrics and recently bought another set that is digital sport is there a difference between the 3 ? both have different controllers im trying to find out if digital is all the same i waqnt to make a large race track using the 2 sets plus others bits of track thats digital one set is drift kings the other is extreme speed, the other john coopper challenge. ive converted the drift cars to race. i just want to know will the controllers work with either set also the start lanes are different hope im making sense