Sanding & Trimming Aftermarket Guides 

I did this exact thing with the Slot Invasion guides for the Carrera cars. They didn't need much (a little less depth and width), but I did have to sand them for my Policar track. Very simple to do. Those Slot Invasion guides work great on the Carrera cars.

And if you don't have a Dremel,,, sell your slot cars and Get One! 😁 Excellent video as always!

As easy as that!