a piece of technology somewhere in the track...im sure you could google just how slot car tracks do it, but I don't care enough to do it for you.

how many scale miles per hour are they moving?

A lot

These are the traditional type of nerds that really like a thing regardless of how popular it is and really enjoy building and contributing to its community. They are completely different from the modern kind that are consumerist individuals and contribute nothing of value to anyone or anything anywhere.

telling it like it is

Those aren't nerds, just tech consumers with a little bit of hipster thrown in. because, while they can't help it, they still don't like being exactly the same as all the other consumer whores.

It appears as though these guys are triggering you hard, SolRo. Is there a story to be had?