[MrFlippant]

Great testing, Sean. Most of my CLCs are Out-to-In, so I didn't get much testing for analog mode using In-to-Out. Assuming the exit flippers (for the intended direction) are fixed, then the In-to-Out should be fine for bi-directional analog running, just like you said. Conversely the Out-to-In (assuming fixed exit flipper) is BAD for BOTH directions of analog racing, as each will either immediately, or eventually cause a car to change to the other lane.
Scalextric should now sell only TWO kinds of CLCs. Left and Right handed In-to-Out CLCs, with fixed exit flippers AND with the copper tape underneath pre-arranged for two-lane analog running.

The Out-to-in CLCs always kind of sucked anyway.