[Mecoprop]

QUOTE turn the voltage below 12 V to reduce its speed
This is one of the areas where Pacer scores well.
Its facility to reduce speed or increase it, is built in to the power supply track so that the Pacer car can be fine tuned AFTER being taught its lap. The beauty of this is that the adjustments can be made at any time, on any part of the circuit, without limitation.

It seems to me that a development of Challenger could perhaps be similarly built in to the so-called 'smart key' which at present seems to possess no actual smartness at all. Maybe it is not practical for one reason or another, but the idea of adjustability is a good one.

 

[Mecoprop]

This isn't a competition between products.
Pacer is certainly not perfect and no one has suggested that it is.
But it does enjoy certain definite advantages as pointed out.
Nor is Challenger perfect either.
For instance, I don't believe that Challenger is any more proof against heat and resistance etc, but am open to correction on this. If Challenger actually 'knows where it is on the circuit', then one must wonder how could it ever make a mistake?