If Scalextric would take the former curve lane changers and cut them in half (like the mods on the other forums) so one could combine either left or right turns to make chicane lane changes. Also, make the curves truly reversable (identical flippers on each end, with easy to relocate flipper mechanism.... the previous ones are easy to move but the flippers are different sizes), then only two 2-piece changers are required (since reversing the change mechanisms would yield both in-to-out and out-to-in combinations), Left and Right. Oh ya, fix the wiring so it works with ARC as well as digital and analogue.