Since unable to post at slotforum, thought should try here to communicate.
As one of the few that were able to succesfully digitize the challenger way back when,
believe you need to know the following.
It was necessary to push the challenger through the straight dual changers when memorizing the track.
Since a lane change to a longer or shorter lane, the memory would be thrown off.
To overcome this, 1 curved crossover was inserted to create a double length lane to be memorized for practice against the human, although using 2 magnets and shorter races to overcome the actual distance change would work too.
Now of course, 1 curved changer would not allow the use of a stock arc pro, since it is unlike previous powerbases, thus it requires the slotforum digital only mod.
Yes the stock challenger would beat me originally in analog and later after its mod, in both digital and in analog still.
However in the end, found it was a lot quicker and easier to practice by just rubberbanding the controller for any digital toy, which would make the stock arc pro acceptable again, of course without using 1 curved crossover, than use the digital challenger and obviously helped to increase my chance of beating it.