[JasonB]

I set up my cars on a Scalextric piece of track so I’m also confused about this.  If it’s a SCX issue, I’ve never even seen SCX track so it’s more understandable.

The old Scalextric Classic track has a shallower slot than the more modern Scalextric Sport, 5mm if memory serves. The SCX track that is being used is more or less the same as Scalextric Classic.

I like Classic track, but the problem is that there are ribs at the bottom of the slot every couple of inches, rather than it being a smooth surface, so a guide that is too deep slams into the ribs, and you either risk damaging the guide mount or causing a big deslot. It's basically impossible to drive.

From BARacer's report it sounds like some of the competitors have put an angle on the front of their guide, which is what I also do. This makes the cars bounce over the ribs, which isn't ideal, but at least leaves the guide at its original depth for other types of track.

I guess this is all part of a rally proxy, racing on different terrain.